We are using a hybrid migration and have some users in AD who don't have an on-premise email, but who will once we move them online. How can we set their primary smtp address on O365 ?
From experience when I try and change an attribute of a synced user it looks for us to change on-premise.
Will it just allow me to add a Primary SMTP since it doesn't have a on-premise account ?
Confused as to whether I need to create an on premise mailbox just to change primary smtp ???