Q: If you manage multiple mailboxes, how do you change the from in outlook?
A: To send email, reply, or forward email as a different address (i.e., email@example.com) vs. yourself,
Click on the From button.
Click on Other Email Address.
In the From Box, type firstname.lastname@example.org Click OK.
You should see the From address has changed (temporarily) and email@example.com has now been added as an option in your From list.