How To configure the RPC proxy server to use specified ports for RPC over HTTP

1. On the RPC proxy server, start Registry Editor (Regedit).
2. In the console tree, locate the following registry key:

   HKEY_LOCAL_MACHINE\Software\Microsoft\Rpc\RpcProxy

3. In the details pane, right-click the ValidPorts subkey, and then click Modify.
4. In Edit String, in the Value data box, type the following information:

   ExchangeServer :6001-6002; ExchangeServerFQDN :6001-6002; ExchangeServer :6004; ExchangeServerFQDN :6004

   • ExchangeServer is the NetBIOS name of your Exchange server.
   • ExchangeServerFQDN is the fully qualified domain name (FQDN) of your Exchange server. If the FQDN that is used to access the server from the Internet differs from the internal FQDN, you must use the internal FQDN.

   To determine the NetBIOS name and the fully qualified domain name of your server, start a command prompt, type ipconfig /all, and then pressENTER. Under Windows IP Configuration, information that is similar to the following appears:

   Host Name .................: mycomputer Primary DNS Suffix ........: contoso.com

   The host name is the NetBIOS name of your computer. The host name together with the primary DNS suffix is the fully qualified domain name of your computer. In this example, the fully qualified domain name is mycomputer.contoso.com.

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