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Port conflict: Store TCP

[This topic is intended to address a specific issue called out by the Exchange Server Analyzer Tool. You should apply it only to systems that have had the Exchange Server Analyzer Tool run against them and are experiencing that specific issue. The Exchange Server Analyzer Tool, available as a free download, remotely collects configuration data from each server in the topology and automatically analyzes the data. The resulting report details important configuration issues, potential problems, and nondefault product settings. By following these recommendations, you can achieve better performance, scalability, reliability, and uptime. For more information about the tool or to download the latest versions, see "Microsoft Exchange Analyzers" at http://go.microsoft.com/fwlink/?linkid=34707.]  

Topic Last Modified: 2007-01-30

The Microsoft® Exchange Server Analyzer Tool reads the following registry entries to determine whether any port conflicts exist:

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\MSExchangeSA\Parameters\HTTP Port

HKLM\System\CurrentControlSet\Services\MSExchangeSA\Parameters\Rpc/HTTP NSPI Port

HKLM\System\CurrentControlSet\Services\MSExchangeIS\ParametersSystem\Rpc/HTTP Port

HKLM\System\CurrentControlSet\Services\MSExchangeSA\Parameters\TCP/IP NSPI Port

HKLM\System\CurrentControlSet\Services\MSExchangeSA\Parameters\TCP/IP Port

HKLM\System\CurrentControlSet\Services\MSExchangeSRS\Parameters\TCP/IP

HKLM\System\CurrentControlSet\Services\MSExchangeIS\ParametersSystem\TCP/IP Port

If the Exchange Server Analyzer finds that the value for HKLM\System\CurrentControlSet\Services\MSExchangeIS\ParametersSystem\TCP/IP Port matches any one of the values specified in the other six port registry values listed earlier in this article, an error is displayed. The Exchange Server Analyzer will also display an error for the port that conflicts with HKLM\System\CurrentControlSet\Services\MSExchangeIS\ParametersSystem\TCP/IP Port.

The most common reason that this value is configured is to enable MAPI clients to connect to an Exchange server that is on the other side of a firewall. This scenario involves opening multiple ports on a firewall to enable Microsoft Office Outlook® 2003 or Outlook 2007 clients to connect using MAPI to an Exchange server, typically over the Internet.

The recommended deployment for using Outlook in MAPI Mode to connect to an Exchange server over the Internet is to use the RPC over HTTP features found in Microsoft Windows Server™ 2003, Exchange Server 2003, Outlook 2003, Exchange Server 2007, Outlook 2007, and Microsoft Windows® XP Professional. MAPI Mode was formerly referred to as "Corporate" or "Workgroup" mode.

To correct this error, you must change the value for this key or the conflicting key as specified by the Exchange Server Analyzer output to a unique value.

importantImportant:
This article contains information about editing the registry. Before you edit the registry, make sure you understand how to restore the registry if a problem occurs. For information about how to restore the registry, view the "Restore the Registry" Help topic in Regedit.exe or Regedt32.exe.

  1. Open a registry editor, such as Regedit.exe or Regedt32.exe.

  2. Navigate to: HKLM\System\CurrentControlSet\Services\MSExchangeIS\ParametersSystem

  3. Double-click the TCP/IP Port key, and set the Value data field to a unique value that is just above 5000 (decimal).

  4. Close the registry editor.

  5. Restart the computer for this setting to take effect.

  1. Review "Exchange Server 2003 RPC over HTTP Deployment Scenarios" (http://go.microsoft.com/fwlink/?linkid=47577).

  2. Review "Deploying Outlook Anywhere" (http://go.microsoft.com/fwlink/?LinkId=80831).

  3. Review the Microsoft Knowledge Base article 833401, "How to configure RPC over HTTP on a single server in Exchange Server 2003" (http://go.microsoft.com/fwlink/?linkid=3052&kbid=833401).

  4. Review the Knowledge Base article 827330, "How to troubleshoot client RPC over HTTP connection issues in Office Outlook 2003" (http://go.microsoft.com/fwlink/?linkid=3052&kbid=827330).

  5. Review the Microsoft Support WebCast, "Using Microsoft Exchange over the Internet (RPC/HTTP) with Microsoft Office Outlook 2003" (http://go.microsoft.com/fwlink/?linkid=3052&kbid=829134).

Before you edit the registry, and for information about how to edit the registry, see the Knowledge Base article 256986, "Description of the Microsoft Windows Registry" (http://go.microsoft.com/fwlink/?linkid=3052&kbid=256986).

For more information about statically mapping ports used by Exchange, see Microsoft Knowledge Base article 270836, "Exchange 2000 and Exchange 2003 static port mappings" (http://go.microsoft.com/fwlink/?linkid=3052&kbid=270836)

 
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