Windows 7 and Windows 8 do not support the latest Office 365 versions, and only Windows 10 supports these (Windows Server operating systems are not covered here). Always define a recovery email address when configuring your Office 365 account. If an incorrect password is entered multiple times, after several unsuccessful login attempts, your Office 365 account will be locked. If your account is locked but you have not defined your recovery email address, try to fill out the Microsoft account recovery form. The plugin is activated on 3 servers (out of 4) and the modern authentication is working just fine.
Microsoft 365 Issues Related to Updates
File and storage issues with Microsoft Office 365 are more serious than other issues. They are not merely inconvenient and slow down work but can also lead to critical data loss. The good news is that the majority of problems can easily be solved on the client’s side.
Office 365 won't log in without EnableADAL = 0
You can set access permissions for the entire organization or invite only the users you specify.After looking deeper into my problem with my RDS servers, the only solution I found is to run the script of @spiceuser-lijul into a GPO at each user logon.Make sure that you have entered the correct Office 365 username and password.Then try to activate the installed Office 365 suite again on your computer.Information and fixes from Microsoft have been scant as well, outside of the registry key one.Not all issues are caused by bugs left unpatched by the software vendor or by third-party applications like the recent Crowdstrike incident that caused a global O365 outage.
If multiple versions of Microsoft Office are installed, Office 365 activation issues may occur. Uninstall old versions of Microsoft Office from your computer and try to activate Microsoft Office 365 again. This works for a week and then the issue raises it’s head again. And it’s random users, not all users experience this in this environment. We inherited this client and it took us 2 weeks custom led signage to discover that whoever setup their O365 tenant originally hadn’t enabled Modern Authentication.
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The only fix is to delete the Teams folder in %appdata%\Microsoft and delete the Outlook profile and re-create it. We have found on user endpoints that the AAD Broker Plugin is sometimes missing and this is what causes all manner of hell and headache with Microsoft applications/services for end users. The Office 365 repair tool can help you fix the majority of Office 365 problems for installed Office 365 applications (not applicable if you use online apps only). You can try to repair Office by using the appropriate built-in tool. The operating system on which your Office 365 applications are installed does not support the updated version of Microsoft Office 365.
Synchronization Issues
In this case, consider using safe mode, which is useful for Office 365 troubleshooting. An internet connection is not available or a firewall is blocking network connections. Installing Office 365 updates can fail for different reasons, and some of them are listed below.
Office 365 applications installed on a computer must connect to Microsoft servers over the internet at least once every 30 days for the license to be checked and validated. If you don’t connect the installed Office 365 applications to Microsoft servers for more than 30 days in a row, these applications are deactivated. Once a connection is established to Microsoft licensing servers, the license is renewed. You can resolve this Office 365 issue simply by purchasing additional cloud storage space from Microsoft. Consider implementing a regular storage cleanup practice with Microsoft 365 recycle bin checks. Keep in mind that the files you delete can temporarily consume storage space.