Hi I have posted this question in the Exchange forum but no one seems to have the answer so I thought this would be the next logical place to ask as what I think needs to be done is a rule needs to be added or changed. We have a brand new setup and cannot get the Office Outlook 2007 (or 2003) to connect to the Exchange server. The Exchange server is a Windows 2008 virtual machine on a Windows 2008 Data Centre box. If I turn off the Windows 2008 firewall that the Exchange 2007 server is running on then we can connect. I think that tells me that the Exchange setup missed creating a rule in the 2008 firewall. Can anyone tell me what rule I need to create so that Outlook will get through the firewall to Exchange? Thanks Paul

Hello, By default, all rules will be created in the process of the Exchange 2007 installation on the Windows Server 2008. Can you see the rules for Exchange 2007 in Windwos Firewall? If not, it indicates that there were some problems during Exchange 2007 installation so the Exchange related firewalls were not generated automatically. If you have another working Windows 2008 server with Exchange 2007 installed, you may export all Exchange related firewall rules from that server and then import them to the problematic server. As I am not very familiar with Exchange, I am not sure which ports should be opened to enable client access. I think that Exchange guys would be better resource here. As far as I know, when a MAPI client such as Microsoft Outlook connects to an Exchange server, the client first connects to the RPC endpoint mapper (the RPC Locator Service) on TCP port 135. The RPC endpoint mapper tells the client which ports to use to connect to the Exchange Server service, which are dynamically assigned. For your reference: Data Path Security Reference http://technet.microsoft.com/en-us/library/bb331973.aspx Network Ports Used by Key Microsoft Server Products http://www.microsoft.com/smallbusiness/support/articles/ref_net_ports_ms_prod.mspx 154596 How to configure RPC dynamic port allocation to work with firewalls http://support.microsoft.com/?kbid=154596 To configure Windows Firewall rules, you may refer to the following link: Managing Windows Firewall with Advanced Security http://technet2.microsoft.com/windowsserver2008/en/library/f81a8ae3-b279-4a1b-ba3c-e647f5529c271033.mspx?mfr=true

Hi MilesThank you for the reply. There are a bunch of Exchange firewall rules there but I am thinking that one got missed. I will follow up with the links you provided and if I get it figured out I will post back my findings. Thanks again for you help.Paul

I accidentally reset the firewall rules after the installation of Exchange and my rules were removed. By chance could you please post the rules that are set up on your machine so that I can replicate them or even better could you email me an export?Thanks in advanceJim