**** UPDATE 04/03/2019 ****

Thanks all for the comments over the years on this script.  It was something that I put together while working as a consultant for a partner and at the time was more or less a demonstration of the distribution of mailboxes across a wide number of databases and servers.  I have since taken a role at Microsoft and much has changed in the service including a number of new datacenters and the offering of multi-geo capabilities.  I have removed this script based on the comments by Brian Day regarding the accuracy of the attribute being used; unfortunately I have no access to the original blog post as it is on my former's employers site.

Thanks!

Joe

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When you move your mailboxes to the cloud, there are some details that you lose a little bit of insight into.  While an acceptable answer to "where are my mailboxes" might be "the cloud", I was curious as to how distributed it is.


I recently put together a script that shows the distribution of mailboxes across Microsoft datacenters.

 

Additional information on the usage of this script can found at the following blog post:

http://blogs.perficient.com/microsoft/2016/03/office-365-script-to-determine-exchange-online-mailbox-location/