I have finally resolved this issue for myself as I was trying to connect for work and was unable to make calls directly from the applications.
COMPUTER: make sure that your microsoft account is set to sync across devices
- go to windows settings
- accounts
- sign-in options (VERIFY YOUR ACCOUNT IF IT'S NOT)
- SYNC YOUR SETTINGS(enable this across your devices)
SMARTPHONE: make sure that you give LINK TO WINDOWS the right permissions if you haven't
Good luck guys it took me a while to get this running following the rabbit hole that is the internet. Hopefully this helps.