Office 365 design question with multiple locations - best practices?

Dieter Rauscher
Regular Visitor

Hi there,


let's say there's a company called "Contoso" which has 200 employees in Germany and 200 in the U.S.. They share the same Maildomain @contoso.com and are currently using 1 on-premises Exchange Server deployment in Germany. U.S. Site is connected via S2S-VPN and they use also just 1 AD (contoso.com) with 2 sites.


They now want to move to Office 365 E3 (or maybe even E5 due to S4B).


As there's just 1 AD I can setup just 1 O365 subscription, right?

So if I subscribe to O365 with location Europe/Germany (I am NOT talking about MS German Cloud), how can I accomodate the U.S. mailboxes with fast access? Having them to connect to Europe might have a performance impact, doesn't it? I can set "location" for the U.S. mailboxes to "United States" but as far as I know this does not have impact on the location where the mailbox ist stored, or?


Thank you!




5 Replies

Hi Dieter,


You are correct, you can only have 1 tenant. And all the mailboxes are stored on Europe.


You can see more information about your concern about performance here - https://support.office.com/en-us/article/Content-delivery-networks-0140f704-6614-49bb-aa6c-89b75dcd7...

We've seen some indications that "multi-geo" tenants might be possible in the not-so-distant future, my guess is we might heard something about it next week on Ignite.

Is the Geo-tenant option available for O365-d-vNext Setups? If yes what the design considerstion should be taken for that.

Any ideas if multiple geo-locatioans of O365 mailboxes are available in Sep-17?

Look out for announcements around Ignite and keep an eye on some of these sessions:


Exchange Online Multi-Geo Capabilities


Understanding Multi-Geo Capabilities in Office 365

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