Only users with domain proxy permissions can proxy as another user.
Caution: Any activity on your part when using Proxy is recorded at that user.
To sign in as proxy for another user:
- Select the User Menu.
- Select Proxy.
- Enter:
- The proxy username or ID when signing in for a user in the same domain.
- Select OK.

When you are signed in as someone's proxy, the User Menu indicates it in the avatar. To turn off the proxy, select Unproxy from the User Menu.
For more information, review this video on Proxying as a Student.