Exchange 2010 - Set As Primary SMTP Address

After migrating to Exchange 2010 from 2003, I found that Microsoft had removed the "Set As Primary" button from the E-mail Addresses tab in Active Directory. In order to change the primary address I had to follow the steps below;

1. Login to the new Exchange server and open Exchange Management Console

2. Browse to Microsoft Exchange On-Premises > Recipient Configuration > Mailbox and find the user's mailbox you wish to change.

3. Under the E-mail Addresses tab, uncheck the Automatically update e-mail addresses based on e-mail address policy checkbox.

4. Add the new SMTP address, or right click the address you want as primary and choose Set As Reply.