I'm now into full swing looking at MSMQ 4.0 on Windows Server 2008 using Virtual Server. I haven't got round to installing 2008 on my 64-bit laptop and desktop yet but maybe in the summer sometime when customers are on vacation I'll have the time.
Sending messages works fine but receiving them fails (0xC00E0069 Remote Machine Not Available). After a little while I realise that the security is tighter than I'm used to so the Windows Firewall must be blocking me. I check the Exceptions list for Windows Firewall (Control Panel) and Message Queuing is there.
This doesn't provide me with much detail, though, so I have a look at Server Manager where I can see two entries.
Checking the properties, I see that these are:
TCP - all ports - for %systemroot%\system32\mqsvc.exe
UDP - all ports - for %systemroot%\system32\mqsvc.exe