Remote Desktop Connection error message- The remote computer disconnected the session because of an error in the licensing protocol. Please try connecting to the remote computer again or contact your server administrator.

I have been using Remote Desktop to connect to my work server.  I recently upgraded to Windows 7 and now I can't get into the Remote Desktop Connection because I get this error. 

"The remote computer disconnected the session because of an error in the licensing protocol. Please try connecting to the remote computer again or contact your server administrator."
 

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Last updated October 16, 2018 Views 60,416 Applies to:
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Hello
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I have gathered the below information from TechNet and if you need further assistance,  then I would suggest you to visit the link below to find a community that will offer the best support.
http://social.technet.microsoft.com/Forums/en/category/w7itpro

“The remote computer disconnected the session because of an error in the licensing protocol. Please try connecting to the remote computer again or contact your server administrator”.
Cause:  The terminal server might not be able to locate the license server.
Solution:  Perform the following steps:
1. Verify that the license server is correctly installed.
2. Verify that the Terminal Server Licensing service is running on the license server.
 3. Verify that the client, the terminal server, and the license server can communicate by ensuring that Domain Name System (DNS) is configured correctly on each computer. To do this, run the ping command from each computer to each computer using the IP address, FQDN, and the NetBIOS name. If any of the ping commands fail, verify the DNS configuration on the network.
4. On the terminal server, set a preferred licensing server to connect to. You can do this by using the registry, a Windows Management Instrumentation (WMI) script, or, in Windows Server 2003 with Service Pack 1, you can use Group Policy settings or Terminal Server Configuration.
See also: Install Terminal Server Licensing; Set preferred Terminal Server license servers; Terminal Server license server roles

Solution:  If the previous solution does not resolve this problem, create a backup of the MSLicensing registry key and its sub keys on the client, and then remove the original key and sub keys by doing the following:
1. On the client, navigate to the following registry sub key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSLicensing.
2. Click MSLicensing.
3. On the Registry menu, click Export Registry File.
4. In the File name box, type mslicensingbackup, and then click Save.
5. If you need to restore this registry key in the future, double-click mslicensingbackup.reg.
6. On the Edit menu, click Delete, and then click Yes to confirm the deletion of the MSLicensing registry subkey.
7. Close Registry Editor, and then restart the computer.
When the client is restarted, the missing registry key is rebuilt.
Caution
Incorrectly editing the registry may severely damage your system. Before making changes to the registry, you should back up any valued data on the computer.
See also: 
Removing Terminal Server Licenses From an RDP Client
(http://go.microsoft.com/fwlink/?LinkId=38560)

Refer this link:-
http://technet.microsoft.com/en-us/library/cc756826(WS.10).aspx#BKMK_8

Hope it helps
Thanks and regards
Dinesh-Microsoft Support
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