Today we are announcing the General Availability (GA) of Sending from Aliases for Exchange Online. This was a highly requested feature that now empowers users to send emails from any alias (proxy add...
Updated Oct 08, 2026
Version 3.0
Blog Post
Unfortunately we can only enable/disable this for the whole tenant. We would like to enable only individual mailboxes to send from email aliases.
Bummer this is still not a thing in GA.