I installed and logged into Teams Free using my legacy Skype account, now an MS account without email… this installed the account into Windows 10 Settings (not my local user account) and logged in MS Edge and probably MS Office, too, if I had bothered to launch Word to find out. I uninstalled it all. I’m tired of being owned by Google and MS.
After looking around, I’m now evaluating Signal (Private) Messenger on Android (the master), linked to Signal Desktop on Windows. I registered my Signal account using a VoIP.ms DID exposed to Nobody… I will use Signal with a disposable username. So far, I like it… privacy with end-to-end encryption, data stored on client(s), and plenty of subtle and flexible functionality to easily replace Skype as I used it, and then some.
Some background on Signal can be found on Wikipedia.
OE