How to Verify Exchange Server 2003 Port Configuration


Topic Last Modified: 2006-04-27

This topic helps you troubleshoot an unsuccessful RPC over HTTP connection. This article explains how to do the following

  • Verify that the ports are set correctly on the Exchange Server 2003 computer.

  • Configure a Windows Server 2003 global catalog server to use specific ports for RPC over HTTP when Exchange is deployed in a single-server environment.

  1. On Exchange Server 2003, run the RPCDump tool (RPCDump.exe) to view the Exchange 2003 port information.

    The RPCDump tool.exe is included in the Windows Server 2003 Resource Kit tools.
  2. Use the RPCDump tool to verify all the following items for the ncacn_http protocol:

    • Verify that the information store is listening on port 6001.

    • Verify that the Directory service proxy server is listening on port 6004.

    • Verify that the Directory Service Referral service is listening on port 6002.

  3. If the Exchange back-end server is also a global catalog server, verify that the global catalog port is set correctly. See procedure below for instructions.

    This step is only required if you configure RPC over HTTP in a single-server environment or if the Exchange back-end server is also a global catalog server.

  1. Start Registry Editor.

    Incorrectly editing the registry can cause serious problems that may require you to reinstall your operating system. Problems resulting from editing the registry incorrectly may not be able to be resolved. Before editing the registry, back up any valuable data.
  2. Locate and then click the following registry subkey:


  3. On the Edit menu, point to New, and then click Multi-String Value.

  4. Name the new registry value NSPI interface protocol sequences.

  5. Right-click NSPI interface protocol sequences, and then click Modify.

  6. In the Value data box, type ncacn_http:6004, and then click OK.

  7. Quit Registry Editor, and then restart the computer.