The Rpc_Binding_Order registry entry is present

Topic Last Modified: 2005-11-18

The Microsoft® Exchange Server Analyzer Tool reads the following registry entry to check for the presence of a client-oriented remote procedure call (RPC) binding order registry entry on the Exchange Server computer:

HKEY_LOCAL_MACHINE\Software\Microsoft\Exchange\Exchange Provider\Rpc_Binding_Order

If the Exchange Server Analyzer finds the Rpc_Binding_Order present, a warning is displayed.

If the Rpc_Binding_Order value is present, it indicates that one or more of the following is installed on the computer:

Exchange Server version 5.5
Microsoft Office Outlook® 2003
Windows Clustering
The RPC_Binding_Order entry determines the protocol sequence that is used when Outlook RPC communications are initiated. This entry is not created in Exchange Server 2003 or in Exchange 2000 Server. This entry is only created in Exchange Server 5.5 and in earlier versions of Exchange. If Exchange Server 5.5 or Microsoft Outlook were previously installed on this computer and have since been removed, you can manually remove this registry entry. In addition, you should remove Outlook from any computer running Exchange Server, as that is an unsupported configuration. For more information about running Exchange and Outlook on the same computer, see the Microsoft Knowledge Base article 266418, "Microsoft does not recommend installing Exchange Server and Outlook on the same computer" (http://go.microsoft.com/fwlink/?linkid=3052&kbid=266418).

Important:
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.

To remove the Rpc_Binding_Order registry entry

Open a registry editor such as Regedit.exe or Regedt32.exe.
Navigate to: HKLM\Software\Microsoft\Exchange\Exchange Provider
Delete the Rpc_Binding_Order value.
Close the registry editor, and restart all Exchange Server services or reboot the Exchange Server computer for the change to take effect.

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

For more information about the RPC_Binding_Order registry entry, see the following Knowledge Base articles:

325930, "How to troubleshoot connectivity issues that are caused by RPC client protocol registry entries" (http://go.microsoft.com/fwlink/?linkid=3052&kbid=325930)
326036, "XADM: Cannot Log On to Exchange 2000 Server Computer by Using the Correct Credentials" (http://go.microsoft.com/fwlink/?linkid=3052&kbid=326036)