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Fix Microsoft 365 Unable to Unblock a Restricted Email User
Question details
The administrator is unable to unblock a restricted email user through the Security and Compliance portal due to a recurring error.
- Product
- Microsoft 365
- Device & OS
- not provided
- Scenario
- Attempting to unblock a user restricted from sending emails in the Microsoft 365 Security and Compliance portal.
- Observed behavior
- The portal returns a "Something went wrong" error message and fails to successfully unblock the user's email-sending capabilities.
Ensure you are logged into the portal with Global Administrator or Security Administrator privileges, and allow at least a few hours after any previous backend synchronization before attempting the unblock process again.
Contact Microsoft Technical Support for a Backend Unblock
When standard portal actions return a persistent "Something went wrong" error, the issue must be resolved by Microsoft Support directly from the backend.
If you have already tried unblocking the user through the Microsoft 365 Security and Compliance portal and waited for synchronization without success, the restriction is likely stuck at the server level. Raising a support ticket allows Microsoft engineers to forcefully unlock the user from their end.
Navigate to admin.microsoft.com and log in with your Global Administrator account credentials.
Locate and click on the 'Help and Support' icon in the bottom right corner of the Microsoft 365 admin center dashboard.
Briefly describe the issue (e.g., 'Unable to unblock restricted user in Security Center') and proceed to contact support to open a formal service ticket.
Specify to the assigned support agent that frontend portal attempts result in a 'Something went wrong' error and request them to unblock the user from the backend.
Troubleshoot Associated Account Sign-In Errors
Check for underlying account-level blocks that might be interfering with the email unblocking process.
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Frequently Asked Questions
Why is my Microsoft 365 user restricted from sending emails?
Microsoft automatically restricts users from sending emails if their automated security systems detect suspicious activity, such as a compromised account sending outbound spam or exceeding bulk email sending limits.
How long does it take for a user to be unblocked after removing the restriction?
Under normal circumstances, once an administrator successfully unblocks a user in the Security and Compliance portal, it can take up to 1 hour for the changes to replicate across the network and for sending capabilities to be fully restored.
Can regular users unblock themselves from the restricted users list?
No. For security reasons, only administrators with assigned roles like Global Administrator or Security Administrator have the necessary permissions to access the restricted users page and lift the email sending block.
