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I have the problem that I cannot connect to a Windows 2008 R2 (SP1) server via RDP using my Mac. The error Message I get is the following: “You were disconnected from the Windows-based computer because of problems during the licensing protocol”

From asking Mr. Google I tried the proposed solution to delete some cached files, but it didn’t resolve the problem.

The strange thing is that to other S servers running Windows 2008 R2 (SP1) on the same Network I can connect.

I checked the configuration on the server and noticed that under Roles -> Remote Desktop Services -> RD Session Host Configuration it says under Connection Type: “Microsoft RDP 7.1”. On other server where I can connect it says “Microsoft RDP 6.1”.

Could that be the reason?

The Mac I use has Lion 10.7.3 installed

Bye, Martin

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Are you using the 1.0.3 or 2.1.1 client? You might be having issues using the older client. Just a thought. – MikeAWood Mar 27 '12 at 1:09
Check that your server is registered with a correct RDP license server – Mathieu Chateau Apr 2 '12 at 19:47
@Mike I'm using the newer one 2.1.1. – mazebuhu Apr 3 '12 at 13:25
@MathieuChateau It is connected to a correct RDP license server I double checked that. – mazebuhu Apr 3 '12 at 13:26
up vote 2 down vote accepted

This is a known issue. You will have to wait for the hotfix from either MS or apple. Use CORD the open source RDP client. I manage several terminal servers and some macs cannot connect. MS has acknowledged the issue.

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Ok got in contact with MS support and they told me exactly the same. We have to wait until they release the hotfix. – mazebuhu Oct 7 '13 at 10:34

Use the latest rdp client 2.1.2

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just tried this and it works fine. checks clean on virustotal in case anyone is concerned.… – starfry Jun 8 '13 at 22:21

Sorry - have this Trouble today RPD 7.1 in a full patched 2008R2 Server an NO official RDC Pack higher than 2.1.1

So you can use CoRD ( We´ve tried and it worked fine for "normal" user RDP Connection

Greetings from Hamburg/Germany Lutz

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