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Microsoft Exchange Web Services
 Namespace Configuration

If you have 
Microsoft Exchange Server
 instances deployed in multiple 
Microsoft Active Directory
 sites, a unique internal 
Microsoft Exchange Web Services
 (EWS) URL must be configured for each site for the 
BlackBerry Push Notifications
 service to work properly. Consider the following scenario: an environment with two 
Microsoft Active Directory
 sites and each site has two Client Access Servers (CAS).
  • Site 1: CAS 1, CAS 2
  • Site 2: CAS 3, CAS 4
In this case, at least two unique internal 
Microsoft Exchange Web Services
 URLs are required, one for Site 1 and one for Site 2. The URLs look something like the following:
  • Site1: https://site1cas.domain.com/EWS/Exchange.asmx
  • Site2: https://site2cas.domain.com/EWS/Exchange.asmx
It is also valid to configure a unique internal 
Microsoft Exchange Web Services
 URL for each client access server.
Before modifying the internal 
Microsoft Exchange Web Services
 URL for your client access servers, first check which 
Microsoft Active Directory
 site the client access servers are in and what the current internal 
Microsoft Exchange Web Services
 URL is set to by running the following command on the 
Microsoft Exchange Server
:
  1. Open a command prompt.
  2. Type 
    nltest /dsgetdc:mydomain.com
    . Press 
    Enter
The “Dc Site Name” output parameter indicates the 
Microsoft Active Directory
 site. For more information on how to use the NLTEST command, visit support.blackberry.com/community to read article 41948.
For information on how to check the internal URL on a CAS server, visit support.blackberry.com/community to read article 41943.