I had this exact issue on another machine, that after 2.5 hours on the phone with MS support (via Zoom), the solution was to uninstall MS Office 365 and reinstall it. Spent weeks with MS support and he got rather irritated when they told him to disable ADAL. He then started digging into Windows and how modern auth works and came across the above fix.

Tools That Can Help

Service health is the online tool available for Office 365 for organizations (if you have work and school Office 365 accounts). Only Office 365 administrators can access this tool in the Office 365 admin center. Use the Service health dashboard to find possible Office 365 issues and read the provided advice on how to fix them. 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.

Common Office 365 Issues and How to Solve Them

Use the NAKIVO solution to back up Microsoft 365 data in Exchange Online, Teams, OneDrive and SharePoint Online for uninterrupted workflows and zero downtime.

Difficulty in updating a SharePoint file with another user

They can either be simple, like the OneDrive service not running or the missing OneDrive icon on the taskbar, or more complex, like OneDrive conflicting with Microsoft 365. Below we provide a more detailed list of issues and corresponding solutions. Editing file permissions and providing users with appropriate access is a simple way to solve such Microsoft 365 problems. To fix these related Office 365 issues, you can try disabling Add-Ins and then running Microsoft apps without them. Check the Add-Ins installed in your Microsoft 365 apps.

• If your account is locked but you have not defined your recovery email address, try to fill out the Microsoft account recovery form.
• I had this exact issue on another machine, that after 2.5 hours on the phone with MS support (via Zoom), the solution was to uninstall MS Office 365 and reinstall it.
• 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.

Domain Verification Issues

This tool should be installed on a computer as a standalone application. After installing and running the application and entering the Office 365 account credentials, run tests to identify the problem and find the needed solution. Follow the instructions provided by the assistant to find and resolve Microsoft Office 365 problems.







Read the blog post about using Office 365 on a terminal server. To avoid data loss when using cloud applications, perform Office 365 data backup. NAKIVO Backup & Replication is a universal data protection solution that can protect not only Office 365 but also virtual, physical, and cloud environments.

I highly recommend NOT just disabling modern authentication Microsoft Outlook troubleshooting using that registry entry because you will have all manner of headache with other Office365 applications. Some of them allow users to get updates before the main release while others provide updates at a later time. The update channel used by Office 365 depends on your Office 365 subscription plan and on configuration. If after running the Remote Connectivity Analyzer Office 365 issues are not fixed, try using Microsoft Support and Recovery Assistant.



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. Make sure that you have entered the correct Office 365 username and password. Safari can cause Microsoft 365 issues due to the Intelligent Tracking Prevention (ITP) feature.