Unable to Unblock User in Restricted Entities in Microsoft Defender

Question

Unable to Unblock User in Restricted Entities in Microsoft Defender

CT 0

When I attempt to unblock a user, I receive the error "Something went wrong, and we were unable to unblock user successfully." I have never encountered this before attempting to unblock users. I've tried multiple browsers over the course of hours and nothing worked. The error persists.

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Answer 1

hello CT,
This looks like a backend or permission-related issue in Microsoft Defender for Office 365 rather than a browser problem.

Things to check:

Ensure your account has sufficient permissions:

Security Administrator

  Global Administrator
  
     Exchange Administrator
     
     Verify the user still exists and is synchronized correctly from Azure AD / Entra ID.
     
     Check if the user is blocked from:
     
        Restricted Entities
        
           Tenant Allow/Block List
           
              Exchange Online Protection
              
              Try removing the restriction using PowerShell instead of the portal.
              
              Check Microsoft 365 service health for any Defender portal incidents: [Microsoft 365 Service Health](https://admin.microsoft.com/Adminportal/Home?utm_source=chatgpt.com#/servicehealth)
              
              If the issue persists for several hours, it is likely a Microsoft-side portal/API issue and opening a Microsoft support ticket is recommended.

You can also try:

Incognito/private mode

Different admin account

Clearing cached Defender session cookies

Waiting 15–30 minutes after recent policy changes before retrying

hope this will help, have a nice day
thankyou so much

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Unable to Unblock User in Restricted Entities in Microsoft Defender

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