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,
I'd like to alias
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
Thanks!
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!
