My apologies for posting this Office 365 question in the Exchange forum but I didn't see any forums dedicated to Office 365.
I have a client configured with Office 365 mailboxes and sync set up from their on-prem AD. Their "domain.com" domain is configured and set as the default domain in the O365 account. Normal procedure is to create the new user on-prem, sync up to O365, then assign a license to the user in O365. Easy, standard procedure.
The problem comes into play when it assigns the email address to the user when synced up. It is defaulting the user to be set as "user1@domain.onmicrosoft.com" instead of "user1@domain.com". There are two easy ways to fix this. Either go into the user properties in O365 after synced and change the primary email address of that user, or when creating the AD user on-prem, manually enter the email address you want them to have so it will set it to that when synced.
Not a big deal, right? However, my client thinks that both of these are "extra steps" and should not be needed, so they want to not have to do either but it still default to "user1@domain.com" at that initial sync. Is this possible?