Outlook showing "TenantAccessBlockedException" while signing in.

Hi @Mivbdev 04, 

Thank you for posting your question in the Microsoft Q&A forum.                  

This error usually occurs if: 

1. Your Microsoft 365 subscription (Exchange Online, M365 E3, etc.) was temporarily suspended due to non-payment or past-due status or you have paid the bill, but the payment has not yet propagated across Microsoft’s backend systems (can take up to 24 hours). 
2. The tenant status is still showing as “Disabled” or “Suspended” in the Microsoft 365 admin center. Sometimes, if you recently moved from a trial to a paid plan, the Exchange service provisioning can get stuck.  

Resolution 

1. Check account status and payments:  Sign in to the Microsoft 365 admin center: https://admin.cloud.microsoft/?#/homepage Review the Bills section to check if there are any unpaid bills. If there is, paying bills is usually unlocked.  Note: If you’re an end-user, please coordinate with your Office 365 Global Administrator to handle these steps.       
2. Contact the Tenant Administrator:  If you're not a tenant admin, contact your IT admin or tenant admin.  Administrators can check the reason for the lock and take appropriate action to lift the lock. 
3. Contact Microsoft Support:  If you're an administrator and can't resolve the issue, contact Microsoft Support for help.  The Global Admin should create a service request with Microsoft support to get advanced technical assistance and diagnostics. For detailed instructions on how to get support, please refer to Get support - Microsoft 365 admin.      If your Office 365 subscriptions are managed through a federated partner or reseller and the Global Admin cannot open a service request, they should contact the reseller’s support provider. The reseller can assist with initiating the request and coordinating with the Office 365 support team.     

Thank you again for your time and understanding. I really appreciate your patience, and I'm here to help. Looking forward to your response. 

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