Teams Version history

Kevin_Pomerleau you can get the version from the download source

IF you copy and paste the link from the webpage it shows as https://teams.microsoft.com/downloads/desktopurl?env=production&plat=windows&arch=x64&managedInstaller=true&download=true

but if you look at the actual download location its https://statics.teams.cdn.office.net/production-windows-x64/1.4.00.35564/Teams_windows_x64.msi or whatever the latest link is

so I assume I have just downloaded version 1.4.00.35564 

To confirm the download page you can use the following in the edge browser you have downloaded from. 

edge://downloads/all 

Once installed the executable teams.exe has the version number.  I don't see what good the version number is if the associated changes do not flow with the version numbers eg.. https://docs.microsoft.com/en-us/officeupdates/teams-admin  the link has release notes for dates but not for version numbers so we have no way of tallying up version numbers with associated fixes.