Update defender-endpoint-trial-user-guide.md

I'm part of the MDE Care Engineering Team, The reason for adding the note is that we've been receiving numerous ICM's requests for offboarding scripts after customer licenses expire. Previously, we had a pipeline in place to handle this on an exceptional basis, but it has since been decommissioned, and we no longer have that capability. By including this note, we aim to proactively inform customers and make the information publicly available, encouraging them to offboard devices before their trial period ends.

defender-endpoint/defender-endpoint-trial-user-guide.md

@@ -118,6 +118,11 @@ After you have onboarded devices, [run a detection test](run-detection-test.md).
 The Microsoft Defender portal ([https://security.microsoft.com](https://security.microsoft.com)) is a central location where you can view onboarded devices, security recommendations, detected threats, alerts, and more. To get started, see [Microsoft Defender portal](/defender-xdr/microsoft-365-defender-portal).   
 
 
+
+> [!IMPORTANT]
+>**Note:** If you decide not to renew your trial, it's important to ensure that the device is offboarded prior to the expiration of the trial period.
+
+
 ## See also
 
 - [Defender for Endpoint technical documentation](microsoft-defender-endpoint.md)