Forum Discussion
MrGrim666
Jun 15, 2026Copper Contributor
MS Teams add in not working on Outlook Classic
This has got me stumped. So far we've changed registry keys: HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Resiliency\DoNotDisableAddinList Name: TeamsAddin.FastConnect Amend name t...
ThatGuyThatDoesStuff
Jun 24, 2026Copper Contributor
Some of our staff are having the same issue.
- On another users laptop that isn't affected by this, browse to C:\Users\username\AppData\Local\Publishers\8wekyb3d8bbwe\TeamsSharedConfig\ and copy this file app_switcher_settings.json somewhere on your computer
- On the affected users computer, exit Teams and Outlook
- On the affected users computer, browse to C:\Users\username\AppData\Local\Publishers\8wekyb3d8bbwe\TeamsSharedConfig\ and copy the app_switcher_settings.json file into TeamsSharedConfig
- Open Teams and leave it open for 2 or so minutes
- Then open Outlook and the ribbon should re-appear