This question may be simple to answer for someone, but I haven't been able to get a clear answer.
We're working with a school that has been test driving Office 365, and have spent some time creating groups, user accounts, etc.
If they implement directory synchronization between Office 365 and their on-premise AD, will the objects/groups created in Office 365 sync back down to the on-premise AD or will they have to start over?
Also, if they have a sub-domain on-premise, should that sync as well?