Hello,
Our university was migrated from Live@edu to O365. We have hybrid configuration. On-premises Exchange 2010 SP3 server for staff and O365 for students. During Live@Edu On-premise mailboxes was syncronized to O365 mailusers by FIM. And FIM set ExternalEmailAddress to this mailusers which direct to on-premise exchange server. But After resyncing via DirSync, ExternalEmailAddress parameter was changed to O365 domain name and as result all emails for On-premise users are looped.
My O365 is still using FOPE.
Where I was wrong?