Alias'ing an MS exchange email address

Sorry if this is a simple question, but I'm always wary/shit-scared of messing with emails/dns 😄 I'm using a primary domain on O365,, with licenses and users set up, and have another unrelated domain,, with no licenses. I'd like to alias, with, so that anyone emailing will actually mail I've found an MS guide here: but just wanted to ask "is this doing what I think it's doing", and if any replies would appear as being from or if it will default to Thanks!
2 Replies
b1mind3mo ago
Why not just forward?
Nick3mo ago
i'm not entirely sure how that would work, i don't work with emails much, was just following that guide