We are transitioning from FOPE to EOP (Exchange servers are on premises) we just use EOP for Spam filtering.
DirSync is setup and seems to work fine, but in FOPE i could see the primary email address for user accounts whereas i cannot see it in EOP.
Regarding UPN, i have 3 domains, do i need to set the UPN suffix in our AD to be the same as the primary email address?
All user accounts have been migrated from FOPE to EOP but i can only see their username not their email addresses, as we use the same UPN for all users i wonder if the new DirSync tool will still sync correctly the primary email address even though the UPN suffix is the same for all users.
Thank you.