O365 Exchange Online Errors/Failures

Last post 12-04-2020, 12:49 PM by MelissaAdams17. 3 replies.
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  • O365 Exchange Online Errors/Failures
    Posted: 11-30-2020, 10:59 AM

    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

  • Re: O365 Exchange Online Errors/Failures
    Posted: 11-30-2020, 12:58 PM

    Found the issue - I had to disable the default security policy.

  • Re: O365 Exchange Online Errors/Failures
    Posted: 12-04-2020, 12:44 PM

    Hello, 

     

    Would mind expanding in more detail how you resolved this?

     

    Thanks

  • Re: O365 Exchange Online Errors/Failures
    Posted: 12-04-2020, 12:49 PM

    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

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