Forum Discussion
Word for Mac Office Add-ins authentication fails, but works in Word Online
- Sep 23, 2026
I have received advice from the Word Product Team at Microsoft that the issue has now been resolved with a change on the service side.
A small number of users may still see the issue if their device is using cached credentials. They can work-around the issue by signing-out and back in or waiting for the token to expire.
I am having the same issue with Windows and PERRLA. Tried to work through chat to address the problem to no avail. They sent me here to see if there were any fixes, but it seems to be that you are having a VERY similiar issue.
- cmt617Sep 25, 2026Tin Contributor
Thanks for sharing! Interesting, especially since you're seeing a very similar issue on Windows with PERRLA (rather than Claude on Mac).
My issue's now been resolved—a Microsoft service-side change was made, and the add-in started working normally again without any changes on my part. Some responders here also noted that some might continue to see the issue temporarily because of cached credentials, in which case signing out and back in or waiting for the token to expire may help.
I can't say whether the PERRLA issue has the same underlying cause, but given how similar the behavior is, it may be worth checking again and updating Microsoft Support if you're still experiencing it. I hope yours has resolved as well!