I'm midway through a transition from Exchange 2003 to 2007. Exchange 2003 is running on a second DC and the network is sitting behind an ISA 2006 box.
Outlook Web Access and RPC over HTTPS both work fine and all is well!
Last week, I added a new Server 2008 64bit box to the network as a member server and installed Exchange 2007 on it using the three part guide on MSExchange.org. I have so far moved only my inbox over for testing. I can connect internally using Outlook, use OWA inside and out but RPC over HTTPS or Outlook Anywhere as it is now called does not work when outside the internal LAN.
Looking at the Connection Status box I can see that my machine is picking up the internal names of the DC and the new Exchange box but it will not connect. Any idea how I can figure out what is stoping the connection occuring?