Exchange 2010 SP1: Change to how static ports are assigned on a CAS server

In my “Uncovering the new RPC Client Access Service in Exchange 2010 (Part 1)” articles series, I among other things explain how you assign static ports for the RPC Client Access service and the Exchange Address Book Service. For the RPC Client Access Service, you need to add a DWORD registry key named “TCP/IP Port” under: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeRpc\ParametersSystem and specify the port you want to assign.

For the Address Book Service, you had to assign a static port using the “” file located in the Exchange Bin folder:


Well, with Exchange 2010 Service Pack 1 the latter has changed. With Exchange 2010 SP1, you no longer use the “” file to assign the static RPC port for the Exchange Address Book Service.


Instead, you do so by creating a new REG_SZ registry key named “RpcTcpPort” under:



Note that you need to create the “Parameters” key.

So remember the above if you’re playing around with static port assignments in the Exchange 2010 SP1 beta build that was released to the public the other day.

Until later,

Henrik Walther
Technology Architect/Writer
MCM: Exchange 2007 | MVP: Exchange Architecture


About The Author

Leave a Comment

Your email address will not be published. Required fields are marked *

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Scroll to Top