I have a group of 3 users who check a single mailbox.
This mailbox uses a client license, but there is no real person there. It is just a mailbox. We'll call it firstname.lastname@example.org.
bob, eric, and vanessa all have thier own user accounts:
All three of them have the ability to check email@example.com, and have full send as permissions to that mailbox.
Question: How do I define a recipient policy (or otherwise configure exchange) so that those three users have firstname.lastname@example.org as their return address instead of their indivdual email accounts?