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Register the new Teams as the chat app for Microsoft 365(requires restarting Microsoft 365 applications) is not working, Can't chat with contacts in Outlook
Additional features, settings, or issues not covered by specific Microsoft Teams categories
Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.
Any update of this New Teams issue?
or can please share some reg to edit to resolve this?
Also ran into this issue on a small subset of our fleet.
After spending way too much time comparing working and non-working workstation settings, I identified that the non-working machines were all missing:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\ClickToRun\REGISTRY\MACHINE\Software\Wow6432Node\IM Providers\MsTeams
It looks like it also worked on machines that had it above Wow6432Node. After exporting from a working machine and importing to a non-working machine issue was resolved post-reboot.
This has worked for me.!!! Thanks @John P Fitzgerald ..
Others can also try..
In our environment, some registries were missing the key in HKEY_LOCAL_MACHINE\SOFTWARE\IM Providers\MsTeams
So FYI to everyone, the registry key location might be different in your environment. I just compared registry keys like John did and exported imported.