Revoke and block a device from temporary RDS

2008 R2 Windows server.

I have 40 RDS CALs by device,

All of my workstations are connected.

In my Temporary RDS there are 6 unkown devices.  I cannot revoke them, it's grayed out.  I can't block them.  The one got in back in September 2012 and is active and it's license is good until November 2013.

I just want to kick everything out of the temporary licensing.  I know about the 90 day period, but it is not working.

Can I change the 90 day period for the temp license?  Can I revoke these devices?  Is there a way to block by device?
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With straight RDS, the license is downloaded to the client's registry (assuming they are windows). When that happens, it is stored in HKLM\Software\Microsoft\MSLicensing.  From the client side, you would just delete that registry key.

You can't easily remove or block a single license.  If you haven't used your re-activations, you can uninstall the licensing service, reinstall it, and reinstall the RDS CAL code. The existing clients will recheck-out the licenses.


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