Can I just confirm something here. One of our users has lost the icon in Outlook and I re-installed Teams without success. In their case, the add-in was disabled in Outlook. Re-enabling it didn't do anything and when you go back in, the box is unchecked again!
When I re-installed Teams, it looked like it was installing the 64-bit version. I removed the add-in before re-installing Teams but now I'm sure which DLL to re-add? Is it this one:
%LocalAppData%\Microsoft\TeamsMeetingAddin\1.0.18164.2\x86\Microsoft.Teams.AddinLoader.dll
Or the x64 version? The user has 32-bit Office - we're a long way before switching to 64-bit due to lack of 64-bit versions of some old add-ins esp. in Excel.
And yes, this add-in really just has to work... plus other 3rd party add-ins such as Powwownow have a much more powerful meeting add-in, e.g. ability to include toll-free numbers from other countries.
BTW - this is one of those very annoying dialogs that's been like this since the year dot. No way to see the entire path...
