Yes; however, when you change an email address, mail sent to the original address will be returned to the sender (unless you've activated your catch-all mailbox). If you edit the email address, be sure to notify the user.

To edit a user's email address:

1. Visit your Email Control Panel.

2. Click the "Edit User" link for the user you'd like to edit.

   
   Email Control Panel - Edit User Link

3. On the Edit User page, click "Change email".

   
   Email Control Panel - Change Email Link

4. In the pop-up dialog box, enter the new email address and then click the Save button.

   
   Email Control Panel - Change Email Address Dialog Box

Note: If a user's status is still pending, you cannot edit the user or associated email address. As soon as the user activates the address, you can edit the account.