Forum Discussion
Word for Mac Office Add-ins authentication fails, but works in Word Online
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.
Hi! I’m experiencing almost exactly the same issue, but with Claude for PowerPoint on Mac, also using a Microsoft 365 Personal subscription.
The add-in installs successfully and appears in PowerPoint, but when I open it, I get: “You don’t have permission to use this add-in. Contact your system administrator to request access.”
I contacted Microsoft Support today and they opened case 7109164621, but so far I haven’t received a solution. I’ve also escalated it to Claude Support.
Were you able to make any progress or find a workaround? Since we’re both using Microsoft 365 Personal on Mac and getting the same permissions error, I’m wondering if this could be a broader issue with Office Add-ins authentication on macOS.
Yes, frustrating! But the issue has now been resolved on my end. Microsoft confirmed that a change was made on the service side, and Claude for Word started working normally again without me making any further changes.
I also just checked my Claude for PowerPoint access, and it's working normally on my Mac as well with the same Microsoft 365 Personal account.
Since you're getting the same permissions error in PowerPoint, it may be related to the same Office Add-ins authentication issue. Just to reiterate what was mentioned by another commenter, Microsoft mentioned that some users might continue to see the problem temporarily because of cached credentials, in which case signing out and back in or waiting for the token to expire may help.
Since you already have a Microsoft support case open, I'd update them that the service-side issue has reportedly been fixed and ask whether your PowerPoint case is related. Hopefully yours resolves shortly/has been resolved too.
