To place a call on hold on one device and pick it up from another device, also known as parking a call, select More actions 
After you park the call, Teams will give you a unique code you can use to retrieve the call. If someone else is retrieving the call, copy the code and share it with them.
To retrieve a parked call, go to the speed dial tab, select Unpark
If no one picks up a parked call within 5 minutes, it’ll ring again.
Note: If you don't see any options for call parking in your settings, talk to your IT Admin.
