Hello Keerthi Mishra,
Welcome to the Microsoft Q&A and thank you for posting your questions here.
Problem
I understand that you are unable to view the usernames of individuals who have unauthorized sign-ins within Microsoft Entra.
Solution
To solve the problem of viewing usernames with unauthorized access in Microsoft Entra (Azure Active Directory) I will provide two options, you can choose any that's convenient for your use and also you will need to follow the steps below:
Using Azure Portal
- Access the Azure portal by sign-in.
- Verify your permissions to ensure you have the necessary access rights. You might need to be a Global Administrator or have the Security Reader role. After ensuring that you have permission then, proceed to step three below.
- Navigate to Azure Active Directory by Go to Sign-In Logs. In the Azure Active Directory blade, select "Monitoring" and then "Sign-ins." This will display a list of all sign-ins for your organization. Use the filter options at the top of the Sign-ins page.
- Review detailed information to see usernames and failure reasons. Click on a specific sign-in entry to view more details. This includes the username, status, application used, and the reason for the failure (e.g., incorrect password, conditional access policy).
- Enable and review additional reports like Risky Sign-Ins and Risky Users for comprehensive insights.
- Ensure that diagnostic settings are configured to log data to a storage account, Log Analytics workspace, or Event Hub for more granular insights.
- Navigate to "Security" under Azure Active Directory, then select "Risky sign-ins" to see a list of sign-ins flagged as risky by Azure AD Identity Protection.
- Similarly, you can view "Risky users" to see users who have been flagged for potential compromise.
Accept Answer
I hope this is helpful! Do not hesitate to let me know if you have any other questions.
** Please don't forget to close up the thread here by upvoting and accept it as an answer if it is helpful ** so that others in the community facing similar issues can easily find the solution.
Best Regards,
Sina Salam