Office addins Not working

Grace Kibe-Hicks 0 Reputation points
2026-06-03T06:25:41.2766667+00:00

I am having trouble with office addins specifically claude which I had working on PowerPoint, Word and Excel but when I logged out of this apps and log back in the addin is not there and it's not working trying to add it back in. I am using Macbook Pro if that helps

Microsoft 365 and Office | Excel | Other | MacOS
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  1. Kai-H 24,760 Reputation points Microsoft External Staff Moderator
    2026-06-03T11:10:40.5166667+00:00

    Hi, Grace Kibe-Hicks

    This sounds less like a Claude-only problem and more like Office for Mac losing the sign-in/add-in cache after you signed out. The “Error loading add-ins” message can happen when Office cannot verify the add-in/store sign-in properly. Office add-ins use local cache, and clearing it can help with add-in errors.

    Here are some suggestions you can try:

    First, fully quit Word, Excel, PowerPoint, and Outlook. Then open Finder, select Go from the top menu, choose Go to Folder, and paste this path:

    ~/Library/Containers/com.Microsoft.OsfWebHost/Data/

    Move the contents of that folder to Trash, then reopen Office and sign in again. It is recommended that you do this before trying to install Claude again, because this folder stores Office web add-in data on Mac.

    If that does not work, check whether Office is signed in with the same Microsoft account that originally had the add-in working. If you have both a work/school account and a personal account, sign out of the wrong one and sign in with the correct one first. This matters because Office add-ins shown in “My Add-ins” can depend on the subscription/account currently signed into Office.

    Also check your Mac date and time under System Settings > General > Date & Time and turn on automatic date/time if it is off. Incorrect date/time is usually listed as one cause of “Error loading add-ins” during installation.

    If it still loops back to the Store, try installing Claude in Word/Excel/PowerPoint on the web at office.com. If it works there but not in the Mac apps, that points to the local Office profile/cache rather than your Claude account.

    Thank you for your patience in reading, I hope this information has been helpful to you. 


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  2. Grace Kibe-Hicks 0 Reputation points
    2026-06-03T06:29:50.8766667+00:00

    When I refresh it says I need to sign in everytime and when I click sign in it goes to the store and when I search Claude and click install nothing happens but I see a error loading addins at the bottom

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