We have a global client with offices all over the world. The clients first O365 tenant was created as an asian tenant with O365 Exchange Online mailboxes as the initial service. Later on the European office migrated to the same O365 tenant placing their mailboxes in the same region (same tenant = same region = same mailserver with Microsoft).
Now in May 2018 GDRP regulation in EU means that all mailboxes need to be stored within EU, so our challenge is how can this be done? We still would want the client to preserve their global adress list, to have one common tenant if possible and global .com emaildomain. We would like to give the EU users a full O365 feature set of mailbox, teams etc but stored from EU datacenter in O365 if possible, but preserve the global .com domain and management.
Is this possible, any ideas on design? The client is a couple of hundred users.