diff --git a/uSync.BackOffice/Authorization/SyncAuthorizationPolicies.cs b/uSync.BackOffice/Authorization/SyncAuthorizationPolicies.cs
index 8ebfc8e5..51f7344d 100644
--- a/uSync.BackOffice/Authorization/SyncAuthorizationPolicies.cs
+++ b/uSync.BackOffice/Authorization/SyncAuthorizationPolicies.cs
@@ -1,4 +1,12 @@
-namespace uSync.BackOffice.Authorization;
+using Microsoft.AspNetCore.Authorization;
+
+using System.Threading.Tasks;
+using Umbraco.Cms.Api.Management.Security.Authorization;
+using Umbraco.Cms.Core.Models.Membership;
+using Umbraco.Cms.Core.Security.Authorization;
+using Umbraco.Extensions;
+
+namespace uSync.BackOffice.Authorization;
 
 /// <summary>
 /// Security policy constants used in Umbraco by uSync
@@ -10,3 +18,48 @@ public static class SyncAuthorizationPolicies
     /// </summary>
     public const string TreeAccessuSync = nameof(TreeAccessuSync);
 }
+
+/// <summary>
+///  this is identical to the internal AllowedApplicationRequirement, but because
+///  that is internal, we have to replicate all the code. 
+/// </summary>
+public sealed class uSyncApplicationRequirement : IAuthorizationRequirement
+{
+    /// <summary>
+    ///  list of applications that this requirement will check against. 
+    /// </summary>
+    public string[] Applications { get; }
+
+    /// <summary>
+    ///  create a new requirement for the given applications
+    /// </summary>
+    /// <param name="applications"></param>
+    public uSyncApplicationRequirement(params string[] applications)
+    {
+        Applications = applications;
+    }
+}
+
+/// <summary>
+///  public version of internal Umbraco AllowedApplicationHandler - so we can secure to a tree. 
+/// </summary>
+public sealed class uSyncAllowedApplicationHandler : MustSatisfyRequirementAuthorizationHandler<uSyncApplicationRequirement>
+{
+    private readonly IAuthorizationHelper _authorizationHelper;
+
+    /// <summary>
+    ///  new handler for the given authorization helper
+    /// </summary>
+    public uSyncAllowedApplicationHandler(IAuthorizationHelper authorizationHelper)
+        => _authorizationHelper = authorizationHelper;
+
+    /// <summary>
+    ///   check to see if this is authorized
+    /// </summary>
+    protected override Task<bool> IsAuthorized(AuthorizationHandlerContext context, uSyncApplicationRequirement requirement)
+    {
+        var allowed = _authorizationHelper.TryGetUmbracoUser(context.User, out IUser? user)
+                      && user.AllowedSections.ContainsAny(requirement.Applications);
+        return Task.FromResult(allowed);
+    }
+}
diff --git a/uSync.BackOffice/uSyncBackOfficeBuilderExtensions.cs b/uSync.BackOffice/uSyncBackOfficeBuilderExtensions.cs
index d419ff41..893372f3 100644
--- a/uSync.BackOffice/uSyncBackOfficeBuilderExtensions.cs
+++ b/uSync.BackOffice/uSyncBackOfficeBuilderExtensions.cs
@@ -11,6 +11,7 @@
 using Umbraco.Cms.Core.Notifications;
 using Umbraco.Cms.Web.Common.ApplicationBuilder;
 
+using uSync.BackOffice.Authorization;
 using uSync.BackOffice.Boot;
 using uSync.BackOffice.Cache;
 using uSync.BackOffice.Configuration;
@@ -84,6 +85,7 @@ public static IUmbracoBuilder AdduSync(this IUmbracoBuilder builder, Action<uSyn
 
         builder.Services.AddTransient<ISyncLegacyService, SyncLegacyService>();
 
+        builder.Services.AddSingleton<IAuthorizationHandler, uSyncAllowedApplicationHandler>();
         builder.Services.AddAuthorization(o => CreatePolicies(o));
 
         builder.Services.AddTransient<ISyncActionService, SyncActionService>();
@@ -246,10 +248,10 @@ internal static void AddHandlerNotifications(this IUmbracoBuilder builder)
     private static void CreatePolicies(AuthorizationOptions options,
         string backofficeAuthenticationScheme = Constants.Security.BackOfficeAuthenticationType)
     {
-        //options.AddPolicy(SyncAuthorizationPolicies.TreeAccessuSync, policy =>
-        //{
-        //    policy.AuthenticationSchemes.Add(backofficeAuthenticationScheme);
-        //    policy.Requirements.Add(new TreeRequirement(uSync.Trees.uSync));
-        //});
+        options.AddPolicy(SyncAuthorizationPolicies.TreeAccessuSync, policy =>
+        {
+            policy.AuthenticationSchemes.Add(backofficeAuthenticationScheme);
+            policy.Requirements.Add(new uSyncApplicationRequirement(Constants.Applications.Settings));
+        });
     }
 }
diff --git a/uSync.Backoffice.Management.Api/Controllers/uSyncControllerBase.cs b/uSync.Backoffice.Management.Api/Controllers/uSyncControllerBase.cs
index 986c2e6d..50b5b1e2 100644
--- a/uSync.Backoffice.Management.Api/Controllers/uSyncControllerBase.cs
+++ b/uSync.Backoffice.Management.Api/Controllers/uSyncControllerBase.cs
@@ -4,19 +4,17 @@
 using Umbraco.Cms.Api.Common.Attributes;
 using Umbraco.Cms.Api.Common.Filters;
 using Umbraco.Cms.Core;
-using Umbraco.Cms.Web.Common.Authorization;
 
 using uSync.Backoffice.Management.Api.Configuration;
+using uSync.BackOffice.Authorization;
 
 namespace uSync.Backoffice.Management.Api.Controllers;
 
 [ApiController]
 [uSyncVersionedRoute("")]
-[Authorize(Policy = AuthorizationPolicies.BackOfficeAccess)]
+[Authorize(Policy = SyncAuthorizationPolicies.TreeAccessuSync)]
 [MapToApi(uSyncClient.Api.ApiName)]
-// [JsonOptionsName(uSyncClient.Api.ApiName)]
 [JsonOptionsName(Constants.JsonOptionsNames.BackOffice)]
-
 public class uSyncControllerBase
 {
 }
diff --git a/uSync.Backoffice.Management.Client/usync-assets/package-lock.json b/uSync.Backoffice.Management.Client/usync-assets/package-lock.json
index 8cd131fc..6ae927e8 100644
--- a/uSync.Backoffice.Management.Client/usync-assets/package-lock.json
+++ b/uSync.Backoffice.Management.Client/usync-assets/package-lock.json
@@ -1,12 +1,12 @@
 {
 	"name": "@jumoo/usync",
-	"version": "14.2.1-build.20240914.1",
+	"version": "14.2.1",
 	"lockfileVersion": 3,
 	"requires": true,
 	"packages": {
 		"": {
 			"name": "@jumoo/usync",
-			"version": "14.2.1-build.20240914.1",
+			"version": "14.2.1",
 			"license": "MPL-2.0",
 			"devDependencies": {
 				"@hey-api/openapi-ts": "^0.53.0",
diff --git a/uSync.Backoffice.Management.Client/usync-assets/package.json b/uSync.Backoffice.Management.Client/usync-assets/package.json
index e19a3104..8b3bd66a 100644
--- a/uSync.Backoffice.Management.Client/usync-assets/package.json
+++ b/uSync.Backoffice.Management.Client/usync-assets/package.json
@@ -2,7 +2,7 @@
 	"name": "@jumoo/usync",
 	"license": "MPL-2.0",
 	"type": "module",
-	"version": "14.2.1-build.20240914.1",
+	"version": "14.2.1",
 	"main": "./dist/usync.js",
 	"types": "./dist/index.d.ts",
 	"module": "./dist/usync.js",