I am trying to install Exchange 2010 into a domain that already has a Exchange 2003 server. I have gone through all of the preperation steps but get a failure on the Hub Transport Role. The error is a s follows: The following error was generated when "$error.Clear(); Add-FirewallException -FirewallRule (New-Object Microsoft.Exchange.Security.WindowsFirewall.MSExchangeRPCByPortRule)" was run: "There are no more endpoints available from the endpoint mapper. (Exception from HRESULT: 0x800706D9)".Please help!

Did u disable the Windows Firewall?CapecolMCSA - MCTS Exchange Server 2007 - 2010

Yes. We disable it on all servers.

Well, apparently you have to enable Windows Firewall to install. I am good to go.Thanks.

I can´t configure settings in Windows Firewall too... Do you have any idea?