While studying for the 70-622 exam using the MS Press book, I came across this Port Query v2.0. I have already found it useful that I created a SMSI package to force it out to all PCs within ConfigMgr site.
Description of the Portqry.exe command-line utility
How to Use Portqry to Troubleshoot Active Directory Connectivity Issues
How to Use Portqry.exe to Troubleshoot Microsoft Exchange Server Connectivity Issues
WebCast: Port Scanning Using PortQry
Attached it the SMSI script to install it within %sys32% directory.