This issue being related to the AAD broker plugin is literally NOWHERE else on the internet. You can disable Add-Ins on launch by pressing CTRL and hitting the Microsoft Office app shortcut. In this case, consider using safe mode, which is useful for Office 365 troubleshooting.

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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. You may encounter issues when using any application, and Office 365 is no exception. 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.

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For example, items that you delete from SharePoint or Microsoft Teams are retained in the recycle bin for a certain period before permanent deletion. Therefore, you can locate the original files at their primary SharePoint site and restore them from there. You can unintentionally send an important Microsoft 365 item to the recycle bin, especially if you have too many files on your device’s hard drive. Still, the files you send to the recycle bin are not permanently removed.

Fix authentication issues in Microsoft 365 apps when you try to connect to a Microsoft 365 service

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.

If your account is locked but you have not defined your recovery email address, try to fill out the Microsoft account recovery form.If you use Microsoft Office 365 Outlook as a standalone email client, and you cannot send and receive email messages, check the Outlook connection settings.Some of them allow users to get updates before the main release while others provide updates at a later time.Installing Office 365 updates can fail for different reasons, and some of them are listed below.I don’t know if this is a permanent fix, but it got me back online.File and storage issues with Microsoft Office 365 are more serious than other issues.It indicates that you have reached the storage limit specified by your subscription plan.

Domain Verification Issues

These add-ins can cause issues such as app crashes or significant performance degradation. Office 365 syncing problems are common for Office Mobile, but sometimes similar issues may occur for Office 365 desktop applications like OneDrive and Outlook. 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.

How do I reset my Office login?
Reset a forgotten Microsoft account passwordSelect "Forgot password?" If the "Enter password" window is still open select Forgotten your password? ...Verify your identity. ...Get a verification code. ...Enter code and reset password.

Check POP3 and SMTP settings for connecting to Microsoft mail servers (addresses of servers, ports, encryption, authentication). If you use Microsoft Office 365 Outlook as a standalone email client, and you cannot send and receive email messages, check the Outlook connection settings. Make sure that network access to the Microsoft servers is not blocked. Check the firewall on your computer, the router, and DNS configuration.

Information and fixes from Microsoft have been scant as well, outside of the registry key one. Office 365 troubleshooting is an important aspect of building a secure and reliable IT environment. In addition to the Office 365 problems explained in the blog post, you may encounter issues that cause data loss. If you want to use Office 365 applications installed on a terminal server, FixTechGuide Microsoft 365 help you should use Office 365 Pro Plus, which supports Shared Computer Activation.

As soon as he figured it out he handed the full fix to MS support with all instructions as shown above. So hopefully the official MS support answer and documentation will change. It’s nuts to me that MS has had this issue for YEARS and has just been duck taping it and moving on. Disabling ADAL can "fix" the issue with outlook but in our experience it still left TONS of other stuff broken.