Fix Microsoft Office 365 Sign in Error 1001 with Official Workaround

Some Workarounds are suggested officially by Microsoft to fix Office 365 Sign in error 1001; follow this until it is permanently resolved.

Microsoft Office 365 Sign in Error 1001

Microsoft Office 365 users are frequently complaining about sign in and syncing issues on Outlook and other applications. We have already covered this topic and suggested a few solutions (based on tech forums websites) to this bug. Deleting or changing the location of OneAuth and IdentityCache folders fixed the error for several users. This post is found here: Fix Office 365 sign in not working Error 1001 in Windows. Now Microsoft has acknowledged the issue and provided an official solution to the sign in error. This workaround includes 2 PowerShell cmdlets using which you are able to fix the Office 365 issue. Furthermore, the company assured that a team is investigating the bug and it will be permanently fixed soon.

When the issue occurs, an error message prompts after opening Outlook and trying to sign in. Moreover, the mail inbox can not sync if you have already signed in. Similar kinds of troubles are likely to happen with other applications pertaining to Office 365. As per the acknowledgment, “When users attempt to sign into Microsoft 365 desktop applications, they receive an error message Error: Something went wrong. [1001]”. The issue is related to security software causing impact on the WAM plug-in (AAD.BrokerPlugin).

Microsoft Office 365 Sign in Error 1001

Here is how to fix Microsoft Office 365 Sign in Error 1001 with Official Workaround:

Restart the system

In several cases, restarting computer helps you to get rid of the problem with the Office 365 app. This will give temporary relief when the issue occurs.

Run PowerShell commands

If still having trouble signing in then run 2 PowerShell commands as advised in the workaround by following the steps:

  1. Click on start and type PowerShell.
  2. Choose Run as administrator.
  3. Copy-paste the following commands sequentially and press Enter after each:
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
how to fix Microsoft Office 365 Sign in Error 1001 with Official Workaround
  1. This will fix Microsoft Office 365 Sign in Error 1001 something went wrong.

These cmdlets will fix the Web Account Manager (WAM) or the plugin affecting this application. The investigation team will further analyze logs provided by users. The company asks affected client administrators to open a support ticket in the M365 Admin Portal to expedite the investigation. You can provide an MSOAID log to the Microsoft Office Authentication/Identity Diagnostic (MSOAID) ticket.

Source: Office support website.

How to submit a ticket and provide MSOAID log

  1. Download MSOAID for Windows by clicking here.
  2. Extract the file “” and go to the uncompressed folder.
  3. Run MSOAID-Win.exe and click on Next.
  4. Make sure that all the options are checked on “Microsoft Office Authentication/Identity Diagnostic” and click on Next.
  5. You can see the path in the coming window, select “Next”.
  6. On the Security Warning window, click on Yes.
  7. Wait for a while until some commands are opening and closing and click on Finish.
  8. To delete the certificates from the root, click on “Yes”
  9. In the end, close the application.


Restart the system
Run PowerShell commands

That’s all!!

Sharing is caring    Share Whatsapp

Topics:  Windows
About Sunita
Love to play with Windows 11 and 10. Suggestion - Going for Registry change or system files edit then remember to take a backup or create a restore point before Starting.