Solve TF53011 Problem
I've got a problem when try to add a new user as Team Foundation Server (TFS) "Licensed User" from my TFS Client event I logged in as TFS administrator.
The problem is the target machine (TFS machine) cannot be resolved from my machine. Following image shows dialog of TFS Client on my machine:

To add new user as "Licensed User" in TFS, please see following url: http://social.msdn.microsoft.com/forums/en-US/tfssetup/thread/0939d3aa-6acc-41f1-b674-c33a9f75351d/
Yes, I have tried the GUI way, but as we can see on above picture, I cannot resolve my server machine to get the user name. So another alternative is to use the command utility (TFSSecurity.exe) directly in the server machine.
So, go log in to the server, find the TFS folder (usually TFS is installed on following path: [SYSTEM_DRIVE]:\Program Files\Microsoft Visual Studio 2008 Team Foundation Server\Tools.
Use following command, then expected user will be registered as "Licensed User":
TFSSecurity.exe /server:TCNBW2K8A /g+ "Team Foundation Licensed Users" n:maulida
And following is the result from above command:
