New Teams meeting add-in is missing from outlook

Hi all,

I took the guidance we got from Teams and posted a Known Issue article with some workaround steps, Teams Meeting add-in is missing in Outlook Desktop after updating to New Teams - Microsoft Support. These should be easier to follow. If I get any feedback on the steps, I'll update the article further. Teams is working to address the issue, but I don't have an ETA yet.

Actually I was able to unzip the MSTeams-x64.msix and the MicrosoftTeamsMeetingAddinInstaller.msi is included. I tested it on a PC with only the new Teams and it installed and worked great.

Glenn, any word on if MS has fixed the Teams meeting add-in yet??

I think I've managed to create a deployment process for new Teams that doesn't disrupt end users working in classic Teams or Outlook.

Migration process goals: 

	install new Teams while classic Teams is still installed 

	install the new Meeting add-in for Outlook that is bundled with new Teams 

	switch the user to the new Meeting add-in for Outlook without disruption 

	switch the user to new Teams by default via Teams admin center 

	remove classic Teams without affecting the Meeting add-in in Outlook 

		 

The main issue is that uninstalling classic Teams "de-registers" the Teams Meeting Add-in and removes it from Outlook by removing registry entries from 

	HKEY\_CLASSES\_ROOT\CLSID\{19A6E644-14E6-4A60-B8D7-DD20610A871D} 

	HKEY\_CLASSES\_ROOT\TeamsAddin.FastConnect\CurVer 

	HKEY\_CLASSES\_ROOT\TeamsAddin.FastConnect.1\CLSID 

	HKEY\_CLASSES\_ROOT\TypeLib\{C0529B10-073A-4754-9BB0-72325D80D122} 

	HKEY\_CLASSES\_ROOT\WOW6432Node\CLSID\{19A6E644-14E6-4A60-B8D7-DD20610A871D} 

	 

	To resolve this, we can (re)run the Teams Meeting installer MSI in the user context after classic Teams has been uninstalled. 

	 

Package preparation: 

	On a reference computer with classic Teams and the Teams Meeting add-in for Outlook installed, run the latest version of the new Teams bootstrapper.exe. Copy the "MicrosoftTeamsMeetingAddinInstaller.msi" from "C:\Program Files\WindowsApps\MSTeams\_23335.219.2592.8659\_x64\_\_8wekyb3d8bbwe" (note that the path is version specific) for use later. Uninstall classic Teams from the user profile with Add & remove programs, then verify that the Teams Meeting add-in for Outlook is no longer available in Outlook. Run the "MicrosoftTeamsMeetingAddinInstaller.msi" in the user context on the reference computer to verify that the Teams Meeting add-in is once again available in Outlook. 

	 

Deploy new Teams to co-exist with classic Teams, but use the add-in bundled with new Teams: 

	Create a deployment package in SCCM/Intune that includes the bootstrapper.exe and the "MicrosoftTeamsMeetingAddinInstaller.msi", a step that runs the bootstrapper.exe, a step that copies the "MicrosoftTeamsMeetingAddinInstaller.msi" to a location on the C: drive (such as C:\Program Files\Microsoft\TeamsMeetingAddin\1.23.33413\MicrosoftTeamsMeetingAddinInstaller.msi, and a scheduled task triggered at user logon that runs the "MicrosoftTeamsMeetingAddinInstaller.msi". 

	 

	This will set the user up to begin using new Teams and will replace the classic Teams Outlook add-in with the new Teams Meeting add-on the next time the user logs on. 

	 

Uninstall classic Teams and repair the Meeting add-in (use this when you're ready to remove classic Teams): 

	Create a second package in SCCM/Intune that creates a scheduled task triggered at user logon that uninstalls classic Teams, immediately thereafter runs "MicrosoftTeamsMeetingAddinInstaller.msi" and adds the LoadBehavior=3 value to HKEY\_CURRENT\_USER\SOFTWARE\Microsoft\Office\Outlook\Addins\TeamsAddin.FastConnect. 

	 

	Uninstalling classic Teams in the user context can be done silently with the command %localappdata%\Microsoft\Teams\Update.exe --uninstall -s 

	The registry values to load the Teams Meeting add-in in Outlook are: 

	 

	[HKEY\_CURRENT\_USER\SOFTWARE\Microsoft\Office\Outlook\Addins\TeamsAddin.FastConnect] 

	"LoadBehavior"=dword:00000003 

	"Description"="Microsoft Teams Meeting Add-in for Microsoft Office" 

	"FriendlyName"="Microsoft Teams Meeting Add-in for Microsoft Office" 

	 

	This process will remove classic Teams and then "re-register" the new Teams Meeting add-in and enable it in Outlook the next time the user logs on. 

What other solutions have people found?

Thanks.

I found an answer by falling forward. When I went to New Teams, I also toggled "Try the new Outlook" in my Outlook (Microsoft 365) desktop client. The Teams add-in doesn't appear in the Ribbon anymore but you can create a new Event in calendar, invite whomever you want as an attendee, and on the right of the window is a slider where you can make the Event a Teams Meeting.

Thanks, Rick - the new perspective that I needed; the new Outlook is not pleasing but sometimes you have to accept the unpalatable, and your solution has done that. The prospect of creating all Teams meetings within Teams for all eternity was just too much.