I did integrate 365 with Server Essentials, everything works OK, but what I didn't expect is the user account created is also creating a user in AD.
I thought that the 365 integration only managed the cloud without Active Directory and that the dir sync with be in use with AD.
So, why does the integration create a user in AD?
(AD integration is turned off in the cloud and also some of the 365 subscription don't support AD integration)
Hope it make sense