Microsoft Teams Outlook Addin Disappears after Teams Update.

Question

[Note] This thread was originally posted on TechNet. Due to the lock down of TechNet forums, we manually migrated this one to Microsoft Q&A platform to continue the troubleshooting.
TechNet thread link

My environment has the Office 365 Enterprise version, recently Microsoft Teams started to install by itself on the computers via the Teams Machine wide installer. Our users have started using Microsoft Teams. However they have been constantly running into an issue where Microsoft Teams Outlook addin disappears. Usually after Microsoft Teams updates, the add-in disappears.

When we troubleshooted the issue, we found that outlook did not have the add-in listed in the add-ins menu. The only way to get it back was to re-register the dll in the old version found in localappdata through command prompt, everytime. Why does Microsoft Teams re-add the plugin every time it updates?Is this a bug or something, a good portion of my users are affected.

Answer 1

[Note] This answer was summarized from the original thread on TechNet platform.
TechNet thread link

As I know, this is not a bug.

According to the official document, many factors can cause this issue.

Bases on your description, it recommends you use Click-to-run install.

Please note that user permissions to execute the Regsvr32.exe file is a minimum requirement for the Teams Meeting add-in to be installed on the computer.

If users do not see the Teams Meeting add-in, close Outlook and Teams, then restart the Teams client first, then sign into Teams, and then restart the Outlook client. Follow the specific order can also resolve this problem.

For more information about Teams Meeting add-in, you can refer to the following articles: https://learn.microsoft.com/en-us/microsoftteams/teams-add-in-for-outlook

https://techcommunity.microsoft.com/t5/microsoft-teams-blog/why-can-t-i-see-the-microsoft-teams-meeting-add-in-for-outlook/ba-p/174630