Auto-launch Microsoft Teams by adding it to my "Login Items" I want Microsoft Teams to start automatically every time I turn on/log into my (company) MacBook (running Mojave 10.14.5. 

I can add it to my login-items under System Preferences -> Users &amp; Groups, but the next time I start up it doesn't launch, and when I go back into System Preference, it's no longer listed in my login-items.

What should I try next?
First, Enable Autostart in the app itself and then add in login items. 

In Microsoft Teams > Click on your avatar > Settings > General > tick Auto-start application

This will allow you to Auto Launch the MS team from Login items.