Looking back, the only solution for multinational companies so far has been to operate a dedicated Office 365 environment (multi-tenants) in the respective country or region. But this elevated the complexity of the overall solution, required additional infrastructure and upped the administrative workload as well. The extra costs were actually quite substantial from a TCO perspective. For instance, it was not possible to use the same SMTP namespace for the individual Office 365 tenants. What’s more, displaying the free and booked times in calendar entries of the individual tenants, i.e. users (for instance to synch calendars), took some fiddling around, also.
Microsoft is offering an alternative to this procedure with its new Office 365 multi-geo capabilities. The needs of multinational companies are addressed additionally using geo-satellite locations (geo-storage instances) based on a central location (tenant). The necessary information in this regard (locations, groups, users etc.) is managed in a central Azure Active Directory. The data (e.g. mailboxes) are kept at their assigned storage locations.
The following diagram illustrates this example very well, based on an Exchange multi-geo topology: