Forum Discussion
Outlook 2016 error 0xCAA70004
Some users report this error message in Outlook 2016. Unable to determine the root cause of the message. Information on the error code is next to none. Any thoughts...?
I was getting this same Pop-up, and I was able to fix it by running the office365 diagnostics tool:
https://diagnostics.office.com/
The diagnosis was invalid cached credentials, and the tool automatically cleared credentials and restarted outlook.
I recently updated office on my laptop - so credentials may have been cached since before that, resulting in the failure. That's mostly guessing at a cause though.
Thank you very much Jett Jones the diagnostics tool worked for me - I'd been struggling with the office sign-in problem for weeks!
