Add and remove delegates       

To manage who can make and receive calls on your behalf, select Settings and more  Select to see more options next to your profile picture at the top of Teams and then choose Settings > General. 

          

Find the Delegation section and choose Manage delegates. There you can see who you're a delegate for, and add and remove your own delegates. 

          

When you add someone as a delegate, you'll see some permissions settings. If you want, you can enable your delegates to make and receive calls on your behalf, as well as let them change your call and delegate settings. 

          

Learn more about delegates here.