Forum Discussion
sarahg7
Sep 16, 2026Tin Contributor
Microsoft Office Add In Error
Hello! ERROR MESSAGE: ADD-IN ERROR: YOU DON'T HAVE PERMISSION TO USE THIS ADD-IN. CONTACT YOUR SYSTEM ADMINISTRATOR TO REQUEST ACCESS. I tried troubleshooting for over an hour today with Microsoft...
RD2
Sep 17, 2026Copper Contributor
I have exact same issue - for Claude and another 3rd party add-in ("FMP") for Excel - spent 90 mins with Support chat - did a Online Repair including re-install Office365 - still didn't work. They suggested I post it here too..