Add Additional Email Address in Exchange Online

Add Additional Email Address in Exchange Online

1. Login to Exchange Online.
2. In the search box at the top, search for the account that will have the additional email address.
3. In the menu on the right, under the General tab, find "Email addresses."
4. Click on the "Manage email address types" link.
5. Click on the "Add email address type" link.
6. Leave the option of SMTP checked.
7. Type in the new Email address.
8. Select the appropriate domain.
9. Leave the "Set as primary email address" option unchecked.
10. Press Ok and then save.

Potential Errors

Email address already in use

If you receive an error message like this after clicking save:

That means the email address has already been assigned to another user.  That email address needs to be removed from that user and then added to the new user.