I'm running an Exchange 2010 server. I need to allow POP3 authentication using an email address as the user ID instead of the domain username. Here's an example:
AD Domain: domain.local
Email domain: domain.com
email address: firstname.lastname@example.org
John logs into his computer using the username email@example.com but has an email address that is firstname.lastname@example.org. Can I enable POP3 authentication using the email address rather than the UPN? How do I do this?