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.

Microsoft Support and Recovery Assistant

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.

Accidental deletion of important files

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.

Common Problems with Office 365 OneDrive

The operating system on which your Office 365 applications are installed does not support the updated version of Microsoft Office 365. 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.

So figuring that was the same issue here, I did the same thing.If you encounter an issue in Office 365 that can only be fixed by the vendor, Microsoft usually releases an update to resolve any known issues as soon as possible.Check the version of Microsoft Office installed on your computer and your subscription name and expiry date.Try testing the configuration of your Office 365 email system and fix the problems that are preventing users from using the email services.It’s nuts to me that MS has had this issue for YEARS and has just been duck taping it and moving on.After installing and running the application and entering the Office 365 account credentials, run tests to identify the problem and find the needed solution.Uninstall old versions of Microsoft Office from your computer and try to activate Microsoft Office 365 again.

Microsoft 365 Issues with the Safari Browser

The good news is that the majority of problems can easily be solved on the client’s side. Microsoft recommends updating Windows, Microsoft Office and other software regularly. Microsoft updates are released on a regular basis and allow you to protect software against known threats, fix bugs, and so on. Office 365 known issues are usually fixed by these updates. Let’s find out what you can do if updates are not installed automatically, and what factors can cause update issues. Reboot your system and try to launch your Outlook app after to check if the synchronization issues are solved.

How to fix Office 365 login issue?
Step-by-Step Troubleshooting for Microsoft Office 365 Login IssuesCheck if the caps lock is on.Make sure you are using the correct account (work, school, or personal).Double-check the username and password before entering.Ensure there is no extra space before or after your username and password.

Microsoft Support and Recovery Assistant

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, Microsoft Outlook troubleshooting 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.