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, exampleA.com, with licenses and users set up, and have another unrelated domain, exampleB.com, with no licenses. I'd like to alias me@exampleA.com, with me@exampleB.com, so that anyone emailing @exampleB.com will actually mail @exampleA.com. I've found an MS guide here: https://learn.microsoft.com/en-us/microsoft-365/admin/setup/add-domain?view=o365-worldwide but just wanted to ask "is this doing what I think it's doing", and if any replies would appear as being from exampleB.com or if it will default to exampleA.com? Thanks!
2 Replies
b1mind
b1mind3mo ago
Why not just forward?
Nick
Nick3mo ago
i'm not entirely sure how that would work, i don't work with emails much, was just following that guide