Outlook - Operation Failed

[Matt Beaman]

I've an issue with what appears to be one specific user account, after joining a machine to AAD, the user cannot open outlook, receiving the 'operation failed' message.

I've tried other user accounts and newly built machines, and it appears to be a problem with a specific user. Has anyone come across this before? Do I recreate the account or mailbox and try that?

Cheers,

Matt

[#2]

Does OWA work? Try creating new Outlook profile, it might help pinpoint the issue. Running Outlook in safe mode can help exclude issues with add-ins, so try it too.

Also, which user profile are you using, the default one on the machine or the Azure AD one?

[#3]

Hi there,

Yes, done all that and completely rebuilt machines, still no joy. AAD profile doesnt work / causes error.

If logging on as a local user their Outlook works perfectly.

Thanks,

Matt

[#4]

OK, let's start with the basics. Are you enforcing MFA? Do you see a "regular" credentials prompt or the ADAL one (browser control)? Run the Autodiscover test from ExRCA (http://aka.ms/rca) and also locally on the machine (hold ctrl, right-click Outlook's icon in the tray, Test E-Mail Autoconfiguration, enter username, clear the two Guessmart checkboxes and run the test). Can you access other O365/Azure AD applications with the same account?

Also run "dsregcmd.exe /status" to cover potential issues with the PRT.