As a delegate, you can view and edit call and delegate settings on behalf of someone else. 

1. Click on your profile picture at the top of Teams and choose Settings > General.

2. Select Manage delegates under Delegation.

3. Click People you support. Here, you'll see a list of the people you're a delegate for. Hover on any name in the list and hit More options  to see your choices: View permissions, Change delegates, and Change call settings.

4. Choose View permissions to edit the permissions of any of your boss's delegates, Change delegates to add or remove delegates for your boss, or Change call settings to adjust their call settings for them.