Michael Burke has put up part 4 of 4 of his Troubleshooting TS Licensing on MSTerminalServices.org.  This article deals with the following items:

• An in-depth look at the MSLicensing registry key
• Using the TSCTST resource kit utility for decoding client CALs
• Popular event IDs and corrupt CAL issues
• Transferring CALs from one client to another
• Some notes on thin-client devices

Read the full article here.