Hey All -

I set up the Exchange Online agent to back up my test environment.  The backups ran successfully for a few days and I'm now getting the following error:

[Failed to process mailbox. Error message [The request failed. The remote server returned an error: (401) unauthorized]]

I'm not very familiar with either Azure AD or the Exchange Admin console.  Could something have changed?  Account lock out?  I verified that MFA is NOT enabled on any account.

I used the admin console and the global admin account to configure the app.

Thanks for any guidance!

Melissa

Hello, 

Would mind expanding in more detail how you resolved this?

Thanks

It took me a few hours of digging into Azure AD to find the issue.  I followed this article to disable security defaults.

https://docs.microsoft.com/en-us/azure/active-directory/fundamentals/concept-fundamentals-security-defaults