I can't sign in to Office apps on my desktop, but I can on browser

Question

I can't sign in to Office apps on my desktop, but I can use apps on browser. I also use apps on my iPhone and am successfully logged in. This problem started after Windows update on the night of 2/12/26. I have cleared cache, deleted windows credentials, and many other online troubleshooting suggestions. I have uninstalled and reinstalled numerous times. Please help.

-Kim

Answer 1

Hello,

Can you please go to https://account.live.com > Services, tell me the exact name of the Microsoft 365 plan name, and see if it is currently still active.

What error/behavior does it give you when you signed in on the app, please describe if you can.

Answer 2

Please follow the steps suggested by Emily. Tell us which specific Office product is associated with your account.

Answer 3

It sounds like you're experiencing issues signing into the Microsoft 365 desktop applications, which can be caused by various factors, especially after a Windows update. Here are some steps you can take to troubleshoot the issue:

1. Check for Security Software Interference: Sometimes, security software can block the sign-in process. Try temporarily uninstalling any security software and see if that resolves the issue.
2. Reinstall WAM Plug-ins: If the issue persists, it may be due to broken or tampered Web Account Manager (WAM) plug-ins. You can reinstall them using PowerShell commands:

      Add-AppxPackage -Register "$env:windir\SystemApps\Microsoft.AAD.BrokerPlugin_cw5n1h2txyewy\Appxmanifest.xml" -DisableDevelopmentMode -ForceApplicationShutdown
      Add-AppxPackage -Register "$env:windir\SystemApps\Microsoft.Windows.CloudExperienceHost_cw5n1h2txyewy\Appxmanifest.xml" -DisableDevelopmentMode -ForceApplicationShutdown
   

3. Check Event Viewer: Look for any warnings or errors related to the AppModel-State in the Event Viewer. This can provide insight into what might be going wrong.
4. Network and Connectivity Issues: Ensure that your network connection is stable and that there are no firewall settings blocking the applications from accessing the internet.
5. Monitor After Changes: After making these changes, monitor the situation for a while to see if the issue recurs.

If these steps do not resolve the problem, you may want to contact Microsoft Support for further assistance.

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References:

• Can't sign in to Microsoft 365 desktop applications
• Can't sign in to Microsoft 365 desktop applications