Forum Discussion

Aaronni's avatar
Aaronni
Occasional Reader
Sep 17, 2026

Excel "You don't have permission to use this add-in"

Microsoft 365 Personal subscription
Excel Version 2608 (Build 20326.20144)
Add-ins work in Excel for the web
Add-ins fail only in desktop Excel when signed in
Issue occurs on two different Windows PCs
Add-ins become available when Office is signed out
Connected Experiences enabled
No Office/Cloud policies configured
Office add-in cache and identity cache already cleared

4 Replies

  • Aaronni's avatar
    Aaronni
    Occasional Reader

    I do have one correction to my post. I have a Microsoft 365 Family plan.

  • mallen's avatar
    mallen
    Occasional Reader

    Same exact issue for me, but I have three devices and it is working on one of them. All three have the same Excel build 2608 (Build 20326.20144)

  • NightSleeper's avatar
    NightSleeper
    Occasional Reader

    Same here. Went through 2 support sessions with Microsoft and they couldn't fix it. Can confirm this is happening on 2 different PCs.