Teams Meeting Add-in Not Appearing in Outlook

The mentioned fix with the app switcher file seems to be part of the fix.

I did that, then i went to

File > Options > Add-ins > pressed Start to see COM Add-ins. 

Then disabled Skype meetings add-in.

Then i restarted Outlook, Teams, opened Teams first then Outlook.

It worked, for some users, if it didnt i then had to go to File > Options > Calendar > Meeting Providers > Microsoft Teams (option was suddenly available)

Hope this helps!

For anyone still having the same issue, please try following this:

(This is from user u/kcheyne in reddit)

I ran into this yesterday and figured it out.

The file app_switcher_settings.json is missing from: %LocalAppData%\Publishers\8wekyb3d8bbwe\TeamsSharedConfig
Without it the meeting addin fails to confirm New Teams is the active client and shuts itself down on every load.

Diagnosis: Check the addin log at: %temp%\Microsoft\Teams\meeting-addin\

• Failure looks like:
• Warn: app_switcher_settings.json file does not exist or does not have value for defaultTeamsApp field.
• Warn: Active Teams App set to Teams1
• NOTE: the error messages in this log field state a wrong field name "defaultTeamsApp". The correct fieldname needed in the json is "defaultApp"

Fix: Copy this file from a known-good machine and paste it in this path: * %LocalAppData%\Publishers\8wekyb3d8bbwe\TeamsSharedConfig\app_switcher_settings.json

Contents of the file that worked for me were this: {"defaultApp":1,"cohort":"","webAccountId_AAD":"","cohortStage":"","userId_AAD":"","previousT1MachineId":"","previousT1SessionId":""}

Then close both Outlook and Teams, launch Teams first, then Outlook.

Same s... different day
we have same problem
teams and office are last versions
plugin installed
even in event viewer are record that plugin are loaded
no button in outlook and no meeting provider in setting list
please advise solution
reinstall not working
fresh os, fresh pc, fresh office 365 and fresh teams

We have the same issue for 3 users/laptops now

same issues here.

Which versions + build numbers of Outlook and Teams do you have installed?

Verify that your default Meeting Provider is set to Teams;
File-> Options-> Calendar-> Meeting Providers...

If it is;
Close Teams and Outlook and then uninstall the "Microsoft Teams Meeting Add-in for Microsoft Office". Then start Teams again and after a few minutes start Outlook as well. This will reinstall the latest version of the Teams Meeting Add-in.

If this indeed solves your issue, then your deployment package likely still includes a package for the old Teams client as well.