Determine your Dynamics 365 portal data center

When you deploy a portal for Dynamics 365 you always want it located as close to your Dynamics 365 instance physically so that the latency for all communications between the portal and Dynamics 365 is as low as possible. With Microsoft managing the portal provisioning they take care of this for you. You still may want to determine the location for hosting of other services that will communicate with your portal, like when your looking at deploying a companion web app for your portal it would be ideal if it is the same data center as your portal.

You can quickly determine your major data center region just by looking at the address to your Dynamics 365 instance. The following link has a listing of all current major regions – Discover the URL for your organization using the Organization Service.  However within these major regions are regional data centers. For instance, https://* (North America which should actually be called USA/Mexico now since there is a region for Canada) has 3 different regional data centers and they are even creating secondary data centers regionally.  Within North America (or USA/Mexico) you could be in West US, Central US, East US, or even East US2.  Within CRM3 (Canada) you could be in Canada Central or Canada East as your primary data center. You can see all the Azure datacenter locations in the following link – Azure Datacenter locations.

Previous ways to determine your data center have involved spinning up an Azure VM and moving it through regions while doing latency tests.  You can also use a IP locator service to help you determine provided the IP address you testing has the proper location data registered with it (this sometimes can give false information as IP addresses can be re-routed to different regions).  Another way which the guys over at Peak Engagement blogged about is using the debug information page which reveals information about your Dynamics instance including the server name, database server, database name and much more.  If you look at patterns you may notice that the names of the servers are based on those regional data centers.

The Dynamics 365 portal has something similar but you can even use this technique on any Dynamics 365 portal without even being the owner of that site.  On every request response to the portal if you inspect the headers you will notice 2 additional response header keys added specifically for the Dynamics 365 portal, x-ms-portal-app and x-ms-request-id. The x-ms-request-id is just a unique GUID for each request, likely exposed to help assist with debugging. The x-ms-portal-app is a value for the site itself, it remains constant through all requests. Taking a look at the value found, there is the site GUID which is the GUID of the Azure Web App and then appended to that is a data center code.

You can easily get to this yourself without even being logged into the portal. The request headers are available on all requests. To look at this value open your browsers developer tools (F12), then select the network tab, open the details of any request and view the response headers. Below is a screenshot of Chrome’s developer tools highlighted with the navigation tips.

Below is a list of the data center region codes found on Dynamics 365 portals from the portals I have checked thus far.

  • EUw – West Europe
  • EUn – North Europe
  • USw – West US
  • GCv – US Government Cloud Virginia
  • GCi – US Government Cloud Iowa
  • USe2 – East US2
  • CAc – Canada Central
  • AUse – Australia Southeast

This is not an exhaustive list, if you come across others then feel free to drop a note in the comments.

You can now use this information to help you when picking a hosting location for a companion app as this region should be in same as your Dynamics 365 instance so you can attempt to get the best performance between applications and the backend Dynamics 365 instance.

Note there are instances where the Dynamics 365 instance and the portal will not be located in the same data center. This is not often the case but instances of this have seen that East US can host Dynamics 365 and East US2 can host the portal, this type of setup might also occur in other locations.

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