Outlook 365 Email Admin User not Login

Hello  @Vidyanand Co-Op Bank Ltd Solapur

Welcome to the Q&A Community! 

Please understand that our forum is a public platform, and we will modify your question to cover your organization domain name in the description. Please notice to hide these personal or organization     

To understand the situation and be able to offer you relevant suggestions, I would need a little more information from you. Kindly help us in providing the following information. 

May I double confirm if you checked with your Admin that your account still has License? To check this kindly sign intoadmin.microsoft.com/ with Admin credentials > choose Active User under Users > click on your username > choose Licenses and apps > Expand Apps > Make sure that Exchange Online(Plan1 or 2) is selected.  

If your account has License, kindly uncheck it and reapply it then wait the sync period to see if it will make any difference 

If you don't have Admin privilege, kindly contact your organization Admin to check above for you. 

If the issue persists, kindly create a support request with Data Protection team. Please ask your admin to go to Office 365 Admin Center    > Support > New Service Request.  

The support engineers there have the correct escalation channel, and proper permission to investigate your account.  

You may refer to this article to check the way how to raise a ticket: Ways to contact support for business products - Admin help.  

I look forward to your response. Kindly note that the above requested information is required for further analysis and troubleshooting of your situation. Your patience and cooperation are much appreciated. Have a nice day! 

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".  

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.  

If a user is unable to log in to Outlook 365 and is encountering a 500 error, it may indicate a server-side issue or a problem with the user's account configuration. Here are some steps you can take to troubleshoot the issue:

1. Check Service Status: Verify if there are any ongoing service issues with Microsoft 365 that might be affecting login capabilities. You can check the Microsoft 365 Service health status for any reported problems.
2. Account Verification: Ensure that the user's account is active and not blocked. You can do this by checking the Microsoft 365 admin center under Users > Active users.
3. Password Reset: If the user has forgotten their password or if there are issues with the password, consider resetting it through the admin center.
4. Outdated Software: Ensure that the user's Outlook client is up to date. Running Windows Update can help resolve issues related to outdated software.
5. Profile Issues: Corrupted Outlook profiles can also cause login issues. If possible, try creating a new Outlook profile for the user to see if that resolves the problem.
6. Run Diagnostics: Use the Microsoft 365 Diagnostic tool to check for any connectivity issues that might be affecting the user's ability to log in.

If these steps do not resolve the issue, further investigation may be required, potentially involving Microsoft Support for more detailed assistance.

References:

• Fix Outlook connection problems for Microsoft 365 account
• Find and fix email delivery issues as a Microsoft 365 for business admin