@Reddy Sekhar Reddy Gaddam
Thank you for your post!
Error message:
"User account 'XXXXXXXXXXXXXXXXX@harsh.com .com' from identity provider 'live.com' does not exist in tenant 'Microsoft Services' and cannot access the application 'b9c392b1-7049-4d6c-86bf-9bb91214900d'(Microsoft Learning Identity Service) in that tenant. The account needs to be added as an external user in the tenant first. Sign out and sign in again with a different Azure Active Directory user account."
Next Steps:
1.You'll have to sign into an account that is part of the Microsoft Learning Identity Service tenant, add your XXXXXXXXXXXXXXXXX@harsh.com .com account.
2.Once the account is added, you can retry logging-in with your outlook user.
Lastly, if this is a Microsoft Learn issue, this currently isn't supported here on the Q&A forums. Our Microsoft Learn experts are actively answering questions in dedicated forums here:
https://trainingsupport.microsoft.com/en-us/
https://techcommunity.microsoft.com/t5/microsoft-learn/ct-p/MicrosoftLearn
If you have any other questions, please let me know.
Thank you for your time and patience throughout this issue.
Please remember to "Accept Answer" if any answer/reply helped, so that others in the community facing similar issues can easily find the solution.