Discover the URL for your organization using the Discovery Service

Applies to Dynamics 365 (online), version 9.x

Use the discovery service service to determine the organizations that a user is a member of, and the endpoint address URL to access the organization service for each of those organizations. This discovery service is necessary because Dynamics 365 Customer Engagement is a multi-tenant environment—a single Dynamics 365 server can host multiple business organizations. By using the discovery service, your application can determine the endpoint address URL to access the target organization’s business data.

For Dynamics 365 (online) installations, server and organization allocation may change as part of datacenter management and load balancing. Therefore, the discovery service provides a way to discover which Dynamics 365 server is serving your organization at a given time.

The following table lists the Web service URLs for the worldwide Dynamics 365 (online) data centers.

Location Discovery Web service URL
North America
North America 2
Europe, Middle East and Africa (EMEA)
Asia Pacific Area (APAC)
Japan (JPN)
South America
India (IND)
United Kingdom (UK)

For an Internet-facing deployment (IFD) installation, the Web service URL has the following form:


For an on-premises installation, the web service URL has the following form:


The Dynamics 365 (online), version 9.0 release is not available for on-premises deployments.


Consult the Developer Resources page in the Dynamics 365 Web application for the correct URL of your installation.

To use the discovery service, add a reference to the Microsoft.Xrm.Sdk.dll assembly to your Visual Studio project, and then add a using or imports statement to access the Microsoft.Xrm.Sdk.Discovery namespace. The IDiscoveryService interface provides Execute method you will use to pass a instance of the DiscoveryRequest class.

Alternatively, you can add the service references for the URLs described previously to your project.

In This Section

Discovery Service Methods
Discovery Service Messages (Request and Response Classes)
Messages in the Discovery Service
Sample: Accessing the DiscoveryService

Write Applications and Server Extensions
Use Dynamics 365 Services
Download endpoints using Developer resources page
Access the Web Services in Dynamics 365
Quick Start: A Simple Program