Why can't I change the email address of my login or a crew member's login?

When a user is linked to a global profile, you can not change the email address of this user's login from within the workspace. 

To change the email address, the crew member should: 

1. Click on the crew member name in the upper-right corner.
2. Click on Return to workspaces.
3. Click on your name in the top-right corner and select Account settings.
4. Change your email address.