diff --git a/tdrive/connectors/onlyoffice-connector/.eslintrc b/tdrive/connectors/onlyoffice-connector/.eslintrc
index 7d57747f5..19c1a8206 100644
--- a/tdrive/connectors/onlyoffice-connector/.eslintrc
+++ b/tdrive/connectors/onlyoffice-connector/.eslintrc
@@ -28,6 +28,7 @@
     "@typescript-eslint/explicit-module-boundary-types": 0,
     "@typescript-eslint/no-explicit-any": "off",
     "@typescript-eslint/ban-types": "off",
+    "@typescript-eslint/no-namespace": "off",
     "@typescript-eslint/no-var-requires": "off"
   }
 }
diff --git a/tdrive/connectors/onlyoffice-connector/src/app.ts b/tdrive/connectors/onlyoffice-connector/src/app.ts
index be49575a7..65258ba9a 100644
--- a/tdrive/connectors/onlyoffice-connector/src/app.ts
+++ b/tdrive/connectors/onlyoffice-connector/src/app.ts
@@ -6,8 +6,10 @@ import { renderFile } from 'eta';
 import path from 'path';
 import errorMiddleware from './middlewares/error.middleware';
 import { SERVER_PORT, SERVER_PREFIX } from '@config';
-import loggerService from './services/logger.service';
+import logger from './lib/logger';
 import cookieParser from 'cookie-parser';
+import apiService from './services/api.service';
+import onlyofficeService from './services/onlyoffice.service';
 
 class App {
   public app: express.Application;
@@ -25,8 +27,8 @@ class App {
   }
 
   public listen = () => {
-    this.app.listen(SERVER_PORT, () => {
-      loggerService.info(`🚀 App listening on port ${SERVER_PORT}`);
+    this.app.listen(parseInt(SERVER_PORT, 10), '0.0.0.0', () => {
+      logger.info(`🚀 App listening on port ${SERVER_PORT}`);
     });
   };
 
@@ -34,7 +36,7 @@ class App {
 
   private initRoutes = (routes: Routes[]) => {
     this.app.use((req, res, next) => {
-      console.log('Requested: ', req.method, req.originalUrl);
+      logger.info(`Received request: ${req.method} ${req.originalUrl} from ${req.header('user-agent')} (${req.ip})`);
       next();
     });
 
@@ -42,6 +44,13 @@ class App {
       this.app.use(SERVER_PREFIX, route.router);
     });
 
+    this.app.get('/health', (_req, res) => {
+      Promise.all([onlyofficeService.getLatestVersion(), apiService.hasToken()]).then(
+        ([version, twakeDriveToken]) => res.status(version && twakeDriveToken ? 200 : 500).send({ version, twakeDriveToken }),
+        err => res.status(500).send(err),
+      );
+    });
+
     this.app.use(
       SERVER_PREFIX.replace(/\/$/, '') + '/assets',
       (req, res, next) => {
diff --git a/tdrive/connectors/onlyoffice-connector/src/controllers/index.controller.ts b/tdrive/connectors/onlyoffice-connector/src/controllers/index.controller.ts
index 08b9f0e56..61e6c8734 100644
--- a/tdrive/connectors/onlyoffice-connector/src/controllers/index.controller.ts
+++ b/tdrive/connectors/onlyoffice-connector/src/controllers/index.controller.ts
@@ -6,7 +6,7 @@ import driveService from '@/services/drive.service';
 import { DriveFileType } from '@/interfaces/drive.interface';
 import fileService from '@/services/file.service';
 import { OfficeToken } from '@/interfaces/routes.interface';
-import loggerService from '@/services/logger.service';
+import logger from '@/lib/logger';
 import * as Utils from '@/utils';
 
 interface RequestQuery {
@@ -96,7 +96,7 @@ class IndexController {
           company_id,
           preview,
           office_token: officeToken,
-        })
+        }),
       );
     } catch (error) {
       next(error);
@@ -134,7 +134,7 @@ class IndexController {
         token: inPageToken,
       });
     } catch (error) {
-      loggerService.error(error);
+      logger.error(error);
       next(error);
     }
   };
diff --git a/tdrive/connectors/onlyoffice-connector/src/controllers/onlyoffice.controller.ts b/tdrive/connectors/onlyoffice-connector/src/controllers/onlyoffice.controller.ts
index 494830816..5c368082a 100644
--- a/tdrive/connectors/onlyoffice-connector/src/controllers/onlyoffice.controller.ts
+++ b/tdrive/connectors/onlyoffice-connector/src/controllers/onlyoffice.controller.ts
@@ -1,10 +1,9 @@
 import { CREDENTIALS_SECRET } from '@/config';
 import { OfficeToken } from '@/interfaces/routes.interface';
-import apiService from '@/services/api.service';
 import driveService from '@/services/drive.service';
 import fileService from '@/services/file.service';
-import loggerService from '@/services/logger.service';
-import onlyofficeService, * as OnlyOffice from '@/services/onlyoffice.service';
+import logger from '@/lib/logger';
+import * as OnlyOffice from '@/services/onlyoffice.service';
 import { Request, Response, NextFunction } from 'express';
 import jwt from 'jsonwebtoken';
 
@@ -14,14 +13,6 @@ interface RequestQuery {
   token: string;
 }
 
-interface SaveRequestBody {
-  filetype: string;
-  key: string;
-  status: number;
-  url: string;
-  users: string[];
-}
-
 /** These expose a OnlyOffice document storage service methods, called by the OnlyOffice document editing service
  * to load and save files
  */
@@ -66,78 +57,72 @@ class OnlyOfficeController {
   };
 
   /**
-   * Receive a file from OnlyOffice document editing service and save it into Twake Drive backend
+   * Receive a file from OnlyOffice document editing service and save it into Twake Drive backend.
+   *
+   * This is the endpoint of the callback url provided to the editor in the browser.
    *
    * Parameters are standard Express middleware.
    * @see https://api.onlyoffice.com/editors/save
    * @see https://api.onlyoffice.com/editors/callback
    */
-  public save = async (req: Request<{}, {}, SaveRequestBody, RequestQuery>, res: Response, next: NextFunction): Promise<void> => {
+  public ooCallback = async (
+    req: Request<{}, {}, OnlyOffice.Callback.Parameters, RequestQuery>,
+    res: Response,
+    next: NextFunction,
+  ): Promise<void> => {
+    const respondToOO = (error = 0) => void res.send({ error });
     try {
       const { url, key } = req.body;
       const { token } = req.query;
-      loggerService.info('Save request', { key, url, token });
+      logger.info('Save request', { key, url, token });
 
       const officeTokenPayload = jwt.verify(token, CREDENTIALS_SECRET) as OfficeToken;
-      const { preview, company_id, file_id, user_id, drive_file_id, in_page_token } = officeTokenPayload;
+      const { preview, company_id, file_id, /* user_id, */ drive_file_id, in_page_token } = officeTokenPayload;
 
       // check token is an in_page_token and allow save
       if (!in_page_token) throw new Error('Invalid token, must be a in_page_token');
       if (preview) throw new Error('Invalid token, must not be a preview token for save operation');
 
-      if (url) {
-        loggerService.info('URL present, saving file');
-        // If token indicate a drive_file_id then check if we want to create a new version or not
-        if (drive_file_id) {
-          loggerService.info('Drive file id present, checking if we need to create a new version');
-          //Get the drive file
-          const driveFile = await driveService.get({
+      switch (req.body.status) {
+        case OnlyOffice.Callback.Status.BEING_EDITED:
+        case OnlyOffice.Callback.Status.BEING_EDITED_BUT_IS_SAVED:
+          // No-op
+          break;
+
+        case OnlyOffice.Callback.Status.READY_FOR_SAVING:
+          const newVersionFile = await fileService.save({
+            company_id,
+            file_id,
+            url,
+            create_new: true,
+          });
+
+          const version = await driveService.createVersion({
             company_id,
             drive_file_id,
+            file_id: newVersionFile?.resource?.id,
           });
+          logger.info('New version created', version);
+          return respondToOO();
 
-          // const createNewVersion = !!driveFile; //Always create a new version because needed by OnlyOffice // driveFile.item.last_version_cache.date_added < Date.now() - 1000 * 60 * 60 * 3;
-          const createNewVersion = true;
-          if (createNewVersion) {
-            const newVersionFile = await fileService.save({
-              company_id,
-              file_id,
-              url,
-              create_new: true,
-            });
-
-            await driveService.createVersion({
-              company_id,
-              drive_file_id,
-              file_id: newVersionFile?.resource?.id,
-            });
-            loggerService.info('New version created');
-
-            res.send({
-              error: 0,
-            });
-
-            return;
-          }
-        }
-        loggerService.info('Saving file');
+        case OnlyOffice.Callback.Status.CLOSED_WITHOUT_CHANGES:
+          // Save end of transaction
+          break;
 
-        await fileService.save({
-          company_id,
-          file_id,
-          url,
-          user_id: user_id,
-        });
-      } else {
-        loggerService.error('URL not present, force saving file');
-        await onlyofficeService.forceSave(key).catch(error => {
-          loggerService.warn("Expected error while force saving without changes (ignored):", error);
-        });
-      }
+        case OnlyOffice.Callback.Status.ERROR_SAVING:
+          // Save end of transaction
+          logger.info(`Error saving file ${req.body.url} (key: ${req.body.key})`);
+          break;
 
-      res.send({
-        error: 0,
-      });
+        case OnlyOffice.Callback.Status.ERROR_FORCE_SAVING:
+          // TODO: notify user ?
+          logger.info(`Error force saving (reason: ${req.body.forcesavetype}) file ${req.body.url} (key: ${req.body.key})`);
+          return void res.send({ error: 0 });
+
+        default:
+          throw new Error(`Unexpected OO Callback status field: ${req.body.status}`);
+      }
+      return respondToOO();
     } catch (error) {
       next(error);
     }
diff --git a/tdrive/connectors/onlyoffice-connector/src/services/logger.service.ts b/tdrive/connectors/onlyoffice-connector/src/lib/logger.ts
similarity index 100%
rename from tdrive/connectors/onlyoffice-connector/src/services/logger.service.ts
rename to tdrive/connectors/onlyoffice-connector/src/lib/logger.ts
diff --git a/tdrive/connectors/onlyoffice-connector/src/lib/polled-thingie-value.ts b/tdrive/connectors/onlyoffice-connector/src/lib/polled-thingie-value.ts
new file mode 100644
index 000000000..d4c2d8a13
--- /dev/null
+++ b/tdrive/connectors/onlyoffice-connector/src/lib/polled-thingie-value.ts
@@ -0,0 +1,98 @@
+import logger from './logger';
+
+const now = () => new Date().getTime();
+type NotUndefined<T> = T extends undefined ? never : T;
+
+/**
+ * Hold a value that is periodically obtained from a fallible process, and
+ * track update times and errors.
+ */
+export class PolledThingieValue<ValueType> {
+  private lastOkTimeMs: number | undefined;
+  private lastKoTimeMs: number | undefined;
+  protected lastValue: ValueType | undefined;
+  protected lastKoError: any;
+  protected pendingTry: Promise<ValueType | undefined> | undefined;
+
+  constructor(
+    private readonly logPrefix: string,
+    private readonly getTheThingieValue: () => Promise<NotUndefined<ValueType>>,
+    private readonly intervalMs: number,
+  ) {
+    this.run();
+    setInterval(() => this.run(), this.intervalMs);
+  }
+
+  protected setResult(value: undefined, error?: NotUndefined<ValueType>, ts?: number);
+  protected setResult(value: NotUndefined<ValueType>, error?: undefined, ts?: number);
+  protected setResult(value: ValueType | undefined, error?: any, ts = now()) {
+    if (value && error) throw new Error(`Unexpected value (${JSON.stringify(value)}) and error (${JSON.stringify(error)})`);
+    if (error) this.lastKoTimeMs = ts;
+    else this.lastOkTimeMs = ts;
+    this.lastValue = value;
+    this.lastKoError = error;
+    if (error) logger.error(this.logPrefix + ' error:', error.stack);
+  }
+
+  private async run() {
+    if (this.pendingTry) return this.pendingTry;
+    return (this.pendingTry = new Promise((resolve, reject) => {
+      this.getTheThingieValue().then(
+        value => {
+          this.setResult(value === undefined ? null : value);
+          this.pendingTry = undefined;
+          resolve(value);
+        },
+        error => {
+          this.setResult(undefined, error.stack);
+          this.pendingTry = undefined;
+          reject(error);
+        },
+      );
+    }));
+  }
+
+  public lastFailed() {
+    return !!this.lastKoTimeMs;
+  }
+
+  public hasValue() {
+    return !!this.lastOkTimeMs;
+  }
+
+  /** Get the latest value and age in seconds if it was successful, or `undefined` */
+  public latest(): { value: ValueType; ageS: number } | undefined {
+    if (!this.hasValue()) return undefined;
+    return {
+      value: this.lastValue,
+      ageS: Math.floor((now() - this.lastOkTimeMs) / 1000),
+    };
+  }
+
+  /** Get the latest value if it was successful, or `undefined` */
+  public latestValue(): ValueType | undefined {
+    if (!this.hasValue()) return undefined;
+    return this.lastValue;
+  }
+
+  /**
+   * Get a promise to the latest value. If there isn't one, try to get one first.
+   * New requests when one is already pending will not cause a separate run,
+   * but get the previous promise back.
+   **/
+  public async latestValueWithTry(): Promise<ValueType | undefined> {
+    if (this.hasValue()) return this.lastValue;
+    if (this.pendingTry) return this.pendingTry;
+    return this.run();
+  }
+
+  /**
+   * Use {@see latestValueWithTry} and if the result is still `undefined`, reject
+   * the promise with the provided `errorMessage`.
+   **/
+  public async requireLatestValueWithTry(errorMessage: string): Promise<ValueType> {
+    const result = await this.latestValueWithTry();
+    if (result === undefined) throw new Error(errorMessage);
+    return result;
+  }
+}
diff --git a/tdrive/connectors/onlyoffice-connector/src/middlewares/auth.middleware.ts b/tdrive/connectors/onlyoffice-connector/src/middlewares/auth.middleware.ts
index 73eb62222..8703da88f 100644
--- a/tdrive/connectors/onlyoffice-connector/src/middlewares/auth.middleware.ts
+++ b/tdrive/connectors/onlyoffice-connector/src/middlewares/auth.middleware.ts
@@ -1,5 +1,5 @@
 import { CREDENTIALS_SECRET } from '@/config';
-import loggerService from '@/services/logger.service';
+import logger from '@/lib/logger';
 import userService from '@/services/user.service';
 import { NextFunction, Request, Response } from 'express';
 import jwt from 'jsonwebtoken';
@@ -25,7 +25,7 @@ export default async (req: Request<{}, {}, {}, RequestQuery>, res: Response, nex
           return;
         }
       } catch (error) {
-        loggerService.error('invalid token', error);
+        logger.error('invalid token', error.stack);
         res.clearCookie('token');
       }
     }
diff --git a/tdrive/connectors/onlyoffice-connector/src/middlewares/error.middleware.ts b/tdrive/connectors/onlyoffice-connector/src/middlewares/error.middleware.ts
index e72ba3d20..ceb298092 100644
--- a/tdrive/connectors/onlyoffice-connector/src/middlewares/error.middleware.ts
+++ b/tdrive/connectors/onlyoffice-connector/src/middlewares/error.middleware.ts
@@ -1,4 +1,4 @@
-import loggerService from '@/services/logger.service';
+import logger from '@/lib/logger';
 import { NextFunction, Request, Response } from 'express';
 
 export default (error: Error & { status?: number }, req: Request, res: Response, next: NextFunction): void => {
@@ -6,7 +6,7 @@ export default (error: Error & { status?: number }, req: Request, res: Response,
     const status: number = error.status || 500;
     const message: string = error.message || 'something went wrong';
 
-    loggerService.error(`[${req.method}] ${req.path} >> StatusCode:: ${status}, Message:: ${message}`);
+    logger.error(`[${req.method}] ${req.path} >> StatusCode:: ${status}, Message:: ${message}`, error.stack);
 
     res.status(status).json({ message });
   } catch (error) {
diff --git a/tdrive/connectors/onlyoffice-connector/src/routes/index.route.ts b/tdrive/connectors/onlyoffice-connector/src/routes/index.route.ts
index e92a14ca3..20fb86111 100644
--- a/tdrive/connectors/onlyoffice-connector/src/routes/index.route.ts
+++ b/tdrive/connectors/onlyoffice-connector/src/routes/index.route.ts
@@ -4,6 +4,10 @@ import authMiddleware from '@/middlewares/auth.middleware';
 import requirementsMiddleware from '@/middlewares/requirements.middleware';
 import { Router } from 'express';
 
+/**
+ * When the user previews or edits a file in Twake Drive, their browser is sent to these routes
+ * which return a webpage that instantiates the client side JS Only Office component.
+ */
 class IndexRoute implements Routes {
   public path = '/';
   public router = Router();
diff --git a/tdrive/connectors/onlyoffice-connector/src/routes/onlyoffice.route.ts b/tdrive/connectors/onlyoffice-connector/src/routes/onlyoffice.route.ts
index 33c8a9b65..6bc3c879b 100644
--- a/tdrive/connectors/onlyoffice-connector/src/routes/onlyoffice.route.ts
+++ b/tdrive/connectors/onlyoffice-connector/src/routes/onlyoffice.route.ts
@@ -15,7 +15,7 @@ class OnlyOfficeRoute implements Routes {
 
   private initRoutes = () => {
     this.router.get(`${this.path}:mode/read`, requirementsMiddleware, this.onlyOfficeController.read);
-    this.router.post(`${this.path}:mode/save`, requirementsMiddleware, this.onlyOfficeController.save);
+    this.router.post(`${this.path}:mode/save`, requirementsMiddleware, this.onlyOfficeController.ooCallback);
   };
 }
 
diff --git a/tdrive/connectors/onlyoffice-connector/src/services/api.service.ts b/tdrive/connectors/onlyoffice-connector/src/services/api.service.ts
index 6ca0f7afa..fd7bd96ed 100644
--- a/tdrive/connectors/onlyoffice-connector/src/services/api.service.ts
+++ b/tdrive/connectors/onlyoffice-connector/src/services/api.service.ts
@@ -5,31 +5,34 @@ import {
   IApiServiceApplicationTokenResponse,
 } from '@/interfaces/api.interface';
 import axios, { Axios, AxiosRequestConfig, AxiosResponse } from 'axios';
-import { CREDENTIALS_ENDPOINT, CREDENTIALS_ID, CREDENTIALS_SECRET, ONLY_OFFICE_SERVER } from '@config';
-import loggerService from './logger.service';
+import { CREDENTIALS_ENDPOINT, CREDENTIALS_ID, CREDENTIALS_SECRET } from '@config';
+import logger from '../lib/logger';
 import * as Utils from '@/utils';
+import { PolledThingieValue } from '@/lib/polled-thingie-value';
 
-/** Client for the Twake Drive backend API on behalf of the plugin (or provided token in parameters) */
+/**
+ * Client for the Twake Drive backend API on behalf of the plugin (or provided token in parameters).
+ * Periodically updates authorization and adds to requests.
+ */
 class ApiService implements IApiService {
-  private axios: Axios;
-  private initialized: Promise<string>;
+  private readonly poller: PolledThingieValue<Axios>;
 
   constructor() {
-    this.initialized = this.refreshToken();
-    this.initialized.catch(error => {
-      loggerService.error('failed to init API', error);
-    });
-
-    setInterval(() => {
-      this.initialized = this.refreshToken();
-      loggerService.info('Refreshing token 🪙');
-    }, 1000 * 60); //TODO: should be Every 10 minutes
+    this.poller = new PolledThingieValue('Refresh Twake Drive token', async () => this.refreshToken(), 1000 * 60); //TODO: should be Every 10 minutes
+  }
+
+  public async hasToken() {
+    return (await this.poller.latestValueWithTry()) !== undefined;
+  }
+
+  private requireAxios() {
+    return this.poller.requireLatestValueWithTry('Token Kind 538 not ready');
   }
 
   public get = async <T>(params: IApiServiceRequestParams<T>): Promise<T> => {
     const { url, token, responseType, headers } = params;
 
-    await this.initialized;
+    const axiosWithToken = await this.requireAxios();
 
     const config: AxiosRequestConfig = {};
 
@@ -43,35 +46,35 @@ class ApiService implements IApiService {
     if (responseType) {
       config['responseType'] = responseType;
     }
-
-    return await this.axios.get(url, config);
+    return await axiosWithToken.get(url, config);
   };
 
   public post = async <T, R>(params: IApiServiceRequestParams<T>): Promise<R> => {
     const { url, payload, headers } = params;
 
-    await this.initialized;
+    const axiosWithToken = await this.requireAxios();
+
     try {
-      return await this.axios.post(url, payload, {
+      return await axiosWithToken.post(url, payload, {
         headers: {
           ...headers,
         },
       });
     } catch (error) {
-      loggerService.error('Failed to post: ', error.message);
+      logger.error('Failed to post to Twake drive: ', error.stack);
       this.refreshToken();
     }
   };
 
   private handleErrors = (error: any): Promise<any> => {
-    loggerService.error('Failed Request', error.message);
+    logger.error('Failed Request to Twake drive', error.stack);
 
     return Promise.reject(error);
   };
 
   private handleResponse = <T>({ data }: AxiosResponse): T => data;
 
-  private refreshToken = async (): Promise<string> => {
+  private refreshToken = async (): Promise<Axios> => {
     try {
       const response = await axios.post<IApiServiceApplicationTokenRequestParams, { data: IApiServiceApplicationTokenResponse }>(
         Utils.joinURL([CREDENTIALS_ENDPOINT, '/api/console/v1/login']),
@@ -92,25 +95,24 @@ class ApiService implements IApiService {
         },
       } = response.data;
 
-      this.axios = axios.create({
+      const axiosWithToken = axios.create({
         baseURL: CREDENTIALS_ENDPOINT,
         headers: {
           Authorization: `Bearer ${value}`,
         },
       });
 
-      this.axios.interceptors.response.use(this.handleResponse, this.handleErrors);
+      axiosWithToken.interceptors.response.use(this.handleResponse, this.handleErrors);
 
-      return value;
+      return axiosWithToken;
     } catch (error) {
-      loggerService.error('failed to get application token', error.message);
-      loggerService.info('Using token ', CREDENTIALS_ID, CREDENTIALS_SECRET);
-      loggerService.info(`POST ${CREDENTIALS_ENDPOINT.replace(/\/$/, '')}/api/console/v1/login`);
-      loggerService.info(`Basic ${Buffer.from(`${CREDENTIALS_ID}:${CREDENTIALS_SECRET}`).toString('base64')}`);
+      logger.error('failed to get application token from Twake drive', error.stack);
+      logger.info('Using token ', CREDENTIALS_ID, CREDENTIALS_SECRET);
+      logger.info(`POST ${CREDENTIALS_ENDPOINT.replace(/\/$/, '')}/api/console/v1/login`);
+      logger.info(`Basic ${Buffer.from(`${CREDENTIALS_ID}:${CREDENTIALS_SECRET}`).toString('base64')}`);
       throw Error(error);
     }
   };
-
 }
 
 export default new ApiService();
diff --git a/tdrive/connectors/onlyoffice-connector/src/services/drive.service.ts b/tdrive/connectors/onlyoffice-connector/src/services/drive.service.ts
index 164159ce4..c070ceb91 100644
--- a/tdrive/connectors/onlyoffice-connector/src/services/drive.service.ts
+++ b/tdrive/connectors/onlyoffice-connector/src/services/drive.service.ts
@@ -1,8 +1,10 @@
 import { DriveFileType, IDriveService } from '@/interfaces/drive.interface';
 import apiService from './api.service';
-import loggerService from './logger.service';
+import logger from '../lib/logger';
 
-/** Client for the Twake Drive backend API dealing with `DriveItem`s  */
+/** Client for Twake Drive's APIs dealing with `DriveItem`s, using {@see apiService}
+ * to handle authorization
+ */
 class DriveService implements IDriveService {
   public get = async (params: { company_id: string; drive_file_id: string; user_token?: string }): Promise<DriveFileType> => {
     try {
@@ -14,7 +16,7 @@ class DriveService implements IDriveService {
 
       return resource;
     } catch (error) {
-      loggerService.error('Failed to fetch file metadata: ', error.message);
+      logger.error('Failed to fetch file metadata: ', error.stack);
 
       return Promise.reject();
     }
@@ -41,7 +43,7 @@ class DriveService implements IDriveService {
 
       return resource;
     } catch (error) {
-      loggerService.error('Failed to create version: ', error.message);
+      logger.error('Failed to create version: ', error.stack);
       return Promise.reject();
     }
   };
diff --git a/tdrive/connectors/onlyoffice-connector/src/services/file.service.ts b/tdrive/connectors/onlyoffice-connector/src/services/file.service.ts
index 19c8267c5..9d8e4698c 100644
--- a/tdrive/connectors/onlyoffice-connector/src/services/file.service.ts
+++ b/tdrive/connectors/onlyoffice-connector/src/services/file.service.ts
@@ -1,12 +1,14 @@
 import { FileRequestParams, FileType, IFileService } from '@/interfaces/file.interface';
 import apiService from './api.service';
-import loggerService from './logger.service';
+import logger from '../lib/logger';
 import { Stream } from 'stream';
 import FormData from 'form-data';
 import * as Utils from '@/utils';
 
+/** Client for Twake Drive's file related APIs, using {@see apiService}
+ * to handle authorization
+ */
 class FileService implements IFileService {
-
   public get = async (params: FileRequestParams): Promise<FileType> => {
     try {
       const { company_id, file_id } = params;
@@ -16,7 +18,7 @@ class FileService implements IFileService {
 
       return resource;
     } catch (error) {
-      loggerService.error('Failed to fetch file metadata: ', error.message);
+      logger.error('Failed to fetch file metadata from Twake Drive: ', error.stack);
 
       return Promise.reject();
     }
@@ -32,7 +34,7 @@ class FileService implements IFileService {
 
       return file;
     } catch (error) {
-      loggerService.error('Failed to download file: ', error.message);
+      logger.error('Failed to download file from Twake Drive: ', error.stack);
     }
   };
 
@@ -66,7 +68,7 @@ class FileService implements IFileService {
         filename,
       });
 
-      loggerService.info('Saving file version: ', filename);
+      logger.info('Saving file version to Twake Drive: ', filename);
 
       return await apiService.post<any, { resource: FileType }>({
         url: create_new
@@ -76,7 +78,7 @@ class FileService implements IFileService {
         headers: form.getHeaders(),
       });
     } catch (error) {
-      loggerService.error('Failed to save file: ', error.message);
+      logger.error('Failed to save file: ', error.stack);
     }
   };
 }
diff --git a/tdrive/connectors/onlyoffice-connector/src/services/onlyoffice.service.ts b/tdrive/connectors/onlyoffice-connector/src/services/onlyoffice.service.ts
index a92c0c95c..72a9a161d 100644
--- a/tdrive/connectors/onlyoffice-connector/src/services/onlyoffice.service.ts
+++ b/tdrive/connectors/onlyoffice-connector/src/services/onlyoffice.service.ts
@@ -1,6 +1,7 @@
-import axios, { Axios, AxiosRequestConfig, AxiosResponse } from 'axios';
+import axios from 'axios';
 import { ONLY_OFFICE_SERVER } from '@config';
-import loggerService from './logger.service';
+import { PolledThingieValue } from '@/lib/polled-thingie-value';
+import logger from '@/lib/logger';
 import * as Utils from '@/utils';
 
 /** @see https://api.onlyoffice.com/editors/basic */
@@ -14,7 +15,7 @@ export enum ErrorCode {
   INVALID_TOKEN = 6,
 }
 /** Return the name of the error code in the `ErrorCode` enum if recognised, or a descript string */
-export const ErrorCodeFromValue = (value: number) => Utils.getKeyForValueSafe(value, ErrorCode, "OnlyOffice.ErrorCode");
+export const ErrorCodeFromValue = (value: number) => Utils.getKeyForValueSafe(value, ErrorCode, 'OnlyOffice.ErrorCode');
 
 /** @see https://api.onlyoffice.com/editors/callback */
 export namespace Callback {
@@ -22,7 +23,7 @@ export namespace Callback {
     USER_DISCONNECTED = 0,
     USER_CONNECTED = 1,
     USER_INITIATED_FORCE_SAVE = 2,
-  };
+  }
 
   enum ForceSaveType {
     FROM_COMMAND_SERVICE = 0,
@@ -31,7 +32,7 @@ export namespace Callback {
     FORM_SUBMITTED = 3,
   }
 
-  enum Status {
+  export enum Status {
     BEING_EDITED = 1,
     /** `url` field present with this status */
     READY_FOR_SAVING = 2,
@@ -49,7 +50,7 @@ export namespace Callback {
     userid: string;
   }
   /** Parameters given to the callback by the editing service */
-  interface Parameters {
+  export interface Parameters {
     key: string;
     status: Status;
     filetype?: string;
@@ -65,13 +66,23 @@ export namespace Callback {
  * @see https://api.onlyoffice.com/editors/command/
  */
 namespace CommandService {
-  interface    BaseResponse                      { error: ErrorCode; }
-  interface SuccessResponse extends BaseResponse { error: ErrorCode.SUCCESS; }
-  interface   ErrorResponse extends BaseResponse { error: Exclude<ErrorCode, ErrorCode.SUCCESS>; }
+  interface BaseResponse {
+    error: ErrorCode;
+  }
+  interface SuccessResponse extends BaseResponse {
+    error: ErrorCode.SUCCESS;
+  }
+  interface ErrorResponse extends BaseResponse {
+    error: Exclude<ErrorCode, ErrorCode.SUCCESS>;
+  }
 
   export class CommandError extends Error {
     constructor(errorCode: ErrorCode, req: any, res: any) {
-      super(`OnlyOffice command service error ${ErrorCodeFromValue(errorCode)} (${errorCode}): Requested ${JSON.stringify(req)} got ${JSON.stringify(res)}`);
+      super(
+        `OnlyOffice command service error ${ErrorCodeFromValue(errorCode)} (${errorCode}): Requested ${JSON.stringify(req)} got ${JSON.stringify(
+          res,
+        )}`,
+      );
     }
   }
 
@@ -80,44 +91,74 @@ namespace CommandService {
 
     /** POST this OnlyOffice command, does not check the `error` field of the response */
     async postUnsafe(): Promise<ErrorResponse | TSuccessResponse> {
-      loggerService.silly(`OnlyOffice command ${this.c} sent: ${JSON.stringify(this)}`);
-      const result = (await axios.post(`${ONLY_OFFICE_SERVER}coauthoring/CommandService.ashx`, this));
-      loggerService.info(`OnlyOffice command ${this.c} response: ${result.status}: ${JSON.stringify(result.data)}`);
+      logger.silly(`OnlyOffice command ${this.c} sent: ${JSON.stringify(this)}`);
+      const result = await axios.post(`${ONLY_OFFICE_SERVER}coauthoring/CommandService.ashx`, this);
+      logger.info(`OnlyOffice command ${this.c} response: ${result.status}: ${JSON.stringify(result.data)}`);
       return result.data as ErrorResponse | TSuccessResponse;
     }
 
     /** POST this request, and return the result, or throw if the `errorCode` returned isn't 0 */
     async post(): Promise<TSuccessResponse> {
       const result = await this.postUnsafe();
-      if (result.error === ErrorCode.SUCCESS)
-        return result;
+      if (result.error === ErrorCode.SUCCESS) return result;
       throw new CommandError(result.error, this, result);
     }
   }
 
   export namespace Version {
-    interface Response extends SuccessResponse { version: string; }
-    export class Request extends BaseRequest<Response> { constructor() { super("version"); } }
+    interface Response extends SuccessResponse {
+      version: string;
+    }
+    export class Request extends BaseRequest<Response> {
+      constructor() {
+        super('version');
+      }
+    }
   }
 
   export namespace ForceSave {
-    interface Response extends SuccessResponse { key: string; }
-    export class Request extends BaseRequest<Response> { constructor(public key: string, public userdata: string = "") { super("forcesave"); } }
+    interface Response extends SuccessResponse {
+      key: string;
+    }
+    export class Request extends BaseRequest<Response> {
+      constructor(public key: string, public userdata: string = '') {
+        super('forcesave');
+      }
+    }
   }
 
   export namespace GetForgotten {
-    interface Response extends SuccessResponse { key: string; url: string; }
-    export class Request extends BaseRequest<Response> { constructor(public key: string) { super("getForgotten"); } }
+    interface Response extends SuccessResponse {
+      key: string;
+      url: string;
+    }
+    export class Request extends BaseRequest<Response> {
+      constructor(public key: string) {
+        super('getForgotten');
+      }
+    }
   }
 
   export namespace GetForgottenList {
-    interface Response extends SuccessResponse { keys: string[]; }
-    export class Request extends BaseRequest<Response> { constructor() { super("getForgottenList"); } }
+    interface Response extends SuccessResponse {
+      keys: string[];
+    }
+    export class Request extends BaseRequest<Response> {
+      constructor() {
+        super('getForgottenList');
+      }
+    }
   }
 
   export namespace DeleteForgotten {
-    interface Response extends SuccessResponse { key: string; }
-    export class Request extends BaseRequest<Response> { constructor(public key: string) { super("deleteForgotten"); } }
+    interface Response extends SuccessResponse {
+      key: string;
+    }
+    export class Request extends BaseRequest<Response> {
+      constructor(public key: string) {
+        super('deleteForgotten');
+      }
+    }
   }
 }
 
@@ -126,12 +167,20 @@ namespace CommandService {
  * @see https://api.onlyoffice.com/editors/command/
  */
 class OnlyOfficeService {
+  private readonly poller: PolledThingieValue<string>;
+  constructor() {
+    this.poller = new PolledThingieValue('Connect to Only Office', () => this.getVersion(), 10 * 1000 * 60);
+  }
+  /** Get the latest Only Office version */
+  public getLatestVersion() {
+    return this.poller.latest();
+  }
   /** Return the version string of OnlyOffice */
   async getVersion(): Promise<string> {
     return new CommandService.Version.Request().post().then(response => response.version);
   }
   /** Force a save in the editing session key provided. `userdata` will be forwarded to the callback */
-  async forceSave(key: string, userdata: string = ""): Promise<string> {
+  async forceSave(key: string, userdata = ''): Promise<string> {
     return new CommandService.ForceSave.Request(key, userdata).post().then(response => response.key);
   }
   /** Return the keys of all forgotten documents in OnlyOffice's document editing service */
diff --git a/tdrive/connectors/onlyoffice-connector/src/services/user.service.ts b/tdrive/connectors/onlyoffice-connector/src/services/user.service.ts
index b9de6ce91..75f5f012c 100644
--- a/tdrive/connectors/onlyoffice-connector/src/services/user.service.ts
+++ b/tdrive/connectors/onlyoffice-connector/src/services/user.service.ts
@@ -1,6 +1,6 @@
 import { IuserService, UserType } from '@/interfaces/user.interface';
 import apiService from './api.service';
-import loggerService from './logger.service';
+import logger from '../lib/logger';
 
 class UserService implements IuserService {
   public getCurrentUser = async (token: string): Promise<UserType> => {
@@ -12,7 +12,7 @@ class UserService implements IuserService {
 
       return resource;
     } catch (error) {
-      loggerService.error('Failed to fetch the current user', error.message);
+      logger.error('Failed to fetch the current user from Twake Drive', error.stack);
 
       return null;
     }
diff --git a/tdrive/connectors/onlyoffice-connector/src/utils.ts b/tdrive/connectors/onlyoffice-connector/src/utils.ts
index 414e7af76..094781722 100644
--- a/tdrive/connectors/onlyoffice-connector/src/utils.ts
+++ b/tdrive/connectors/onlyoffice-connector/src/utils.ts
@@ -1,6 +1,6 @@
 /** Return the key in `obj` of which the value matches the `value` parameter, or `undefined` */
 export function getKeyForValue<T>(value: T, obj: any): string | undefined {
-  return (Object.entries(obj as { [key: string]: T }).filter(([_key, entryValue]) => value === entryValue)[0] ?? [])[0];
+  return (Object.entries(obj as { [key: string]: T }).filter(([, entryValue]) => value === entryValue)[0] ?? [])[0];
 }
 
 /** Same as `getKeyForValue` but returns a default string for values not found */
@@ -14,14 +14,12 @@ export type QueryParams = { [key: string]: string | number };
 
 /** Compose a URL removing and adding slashes and query parameters as warranted */
 export function joinURL(path: string[], params?: QueryParams) {
-  let joinedPath = path.map(x => x.replace(/(?:^\/+)+|(?:\/+$)/g, "")).join("/");
-  if (path[path.length - 1].endsWith("/"))
-    joinedPath += "/";
+  let joinedPath = path.map(x => x.replace(/(?:^\/+)+|(?:\/+$)/g, '')).join('/');
+  if (path[path.length - 1].endsWith('/')) joinedPath += '/';
   const paramEntries = Object.entries(params || {});
-  if (paramEntries.length === 0)
-    return joinedPath;
-  const query = paramEntries.map((p) => p.map(encodeURIComponent).join("=")).join("&");
-  return joinedPath + (joinedPath.indexOf("?") > -1 ? "&" : "?") + query;
+  if (paramEntries.length === 0) return joinedPath;
+  const query = paramEntries.map(p => p.map(encodeURIComponent).join('=')).join('&');
+  return joinedPath + (joinedPath.indexOf('?') > -1 ? '&' : '?') + query;
 }
 
 /** Split a filename into an array `[name, extension]`. Either and both can be
@@ -42,8 +40,7 @@ export function joinURL(path: string[], params?: QueryParams) {
  */
 export function splitFilename(filename: string): [string, string] {
   const parts = filename.split('.');
-  if (parts.length < 2 || (parts.length == 2 && parts[0] === ""))
-    return [filename, ""];
+  if (parts.length < 2 || (parts.length == 2 && parts[0] === '')) return [filename, ''];
   const extension = parts.pop();
-  return [parts.join("."), extension];
+  return [parts.join('.'), extension];
 }
diff --git a/tdrive/connectors/onlyoffice-connector/src/views/index.eta b/tdrive/connectors/onlyoffice-connector/src/views/index.eta
index f4f6c30f4..a88e8012e 100644
--- a/tdrive/connectors/onlyoffice-connector/src/views/index.eta
+++ b/tdrive/connectors/onlyoffice-connector/src/views/index.eta
@@ -34,24 +34,6 @@
           preview: <%= it.preview %>,
         }
       }
-      const documentChangeHandler = function (event) {
-        $.ajax({
-          url: `${window.baseURL}save?file_id=<%= it.file_id %>&company_id=<%= it.company_id %>&token=<%= it.token %>`,
-          type: 'POST',
-          contentType: 'application/json',
-          data: JSON.stringify({
-            file_id: "<%= it.file_id %>",
-            key: "<%= it.file_version_id %>",
-            token: "<%= it.token %>"
-          }),
-          success: function() {
-            console.log('save success');
-          },
-          error: function() {
-            console.log('save error');
-          }
-        });
-      }
 
       window.docEditor = new DocsAPI.DocEditor('onlyoffice_container_instance', {
         scrollSensitivity: window.mode === 'text' ? 100 : 40,
@@ -80,11 +62,8 @@
             },
           },
         },
-        events: {
-          onDocumentStateChange: documentChangeHandler,
-        }
       });
-    
+
     });
   </script>
 </body>