Error: The remote session was disconnected because there was an internal error in the remote computer's licensing protocol

Occasionally, a user may run into the error message below when attempting to RDP into another machine:

Windows 7

Find another computer (same OS version, i.e. Win 7 Enterprise), go to regedit --> 

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSLicensing  >

Right-click on MSLicensing key > Export and save the .reg file. 

Then, copy that .reg file to the user's machine where the issue is occurring and double-click to install it.  This should fix it.

Also:

When using per-device CALs, RDP needs to write a license to

HKEY_LOCAL_MACHINE\Software\Microsoft\MSLicensing 

and if it cannot, then you will get this message.

o   Reason: logged on user does not have rights to write to registry location

o   Solution: Disable UAC or give user necessary rights to reg location -- full control to local "USERS" group .

Windows 10

Delete the following in regedit:

Computer\HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\MSLicensing\HardwareID

Computer\HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\MSLicensing\Store\License000

Then, grant full control to local "USERS" group on:

Computer\HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\MSLicensing