Microsoft fixes bug behind random Office 365 deactivation errors

Latest News on Office 365 Deactivation Bug Fix

Bug Fix for Random Office 365 Deactivation Errors:
Microsoft has recently addressed a known issue causing random "Product Deactivated" errors for customers using Microsoft 365 Office apps1. The bug was triggered by licensing changes initiated by administrators, such as switching subscriptions from Office 365 E3 to Microsoft 365 E3 or moving users between licensing groups. The issue could also be caused by admins adjusting license or service plan settings, removing and re-adding users to license groups, or toggling the "Latest version of Desktop Apps" service plan under the Microsoft 365 subscription.

Fix Deployment:
Microsoft has deployed a patch to resolve the unexpected product deactivations. Affected users are advised to click the "Reactivate" button on the error banner and sign in when prompted. Alternatively, they can sign out of all Microsoft 365 apps, close them, and restart them before signing back in to address the deactivation issue1.

Microsoft Office 365 Security Update

Recent Security Updates:
While there is no specific mention of a major security update in the recent news, Microsoft has been actively addressing various issues and vulnerabilities in Office 365. For instance, Microsoft is investigating a known issue causing random product deactivation errors, which could potentially be exploited by malicious actors if not addressed promptly1 4.

Other Notable Updates:

Certificate-Based Authentication: Microsoft is enforcing full enforcement mode for certificate-based authentication changes on Windows DCs starting February 20252.
Teams Policy: A new Microsoft Teams policy for voice and face enrollment will default to "On" starting mid-February 20252.
App Management: Unified management of Teams apps in Teams, Outlook, and the Microsoft 365 app will begin in January 20252.

Office 365 Random Errors 2024

Recent Error Reports:

Product Deactivation Errors: As mentioned earlier, Microsoft is addressing a known issue causing random "Product Deactivated" errors. This issue is primarily related to licensing changes and administrative actions1 4.
App Update Issues: Some users have reported errors with Microsoft 365 Office applications, including issues with updates and licensing auto-upgrades5.
Other Errors: There have been reports of various other errors, such as issues with font installation, email download errors, and problems with Office Professional Plus 2024 licensing auto-upgrade to 03653 5.

Summary

Bug Fix: Microsoft has fixed a bug causing random "Product Deactivated" errors in Office 365 by deploying a patch to resolve unexpected product deactivations.
Security Updates: Microsoft is enforcing full enforcement mode for certificate-based authentication changes and introducing new policies for Teams.
Other Errors: Various other errors have been reported, including issues with app updates, font installation, and email download.

For the most up-to-date information, users are advised to check Microsoft's official support documents and community forums.