An exception was thrown during while updating the dns cache
The parameter -Num Lock was passed in with the following value "NULL".
Virtual environment creation fails in the "Customization" step with error "Windows could not parse or process the unattend answer file for pass[specialize].
Then, select the hardware properties of the virtual machine. COMException (0x8007056C): A new member could not be added to a local group because the member has the wrong account type.” The “tfsconfig lab” command is available for advanced users and provides functionality for advanced scenarios such as unconfiguring a collection etc.
The lab service account available on this machine is not valid.The placement policy for this host group is set to be conservative and hence virtual machines that are in stopped state are also accounted as consuming host resources."Restore snapshot on virtual environment fails with error: "TF259098: Team Foundation Server could not perform the following operation because of errors on one or more virtual machines: Restore snapshot. Socket Exception (0x80004005): Only one usage of each socket address (protocol/network address/port) is normally permitted “Test agent fails to connect to controller and fails with the error System. The agent can connect to the controller but the controller cannot connect to the agent because of the following reason: Authentication failed on the remote side (the stream might still be available for additional authentication attempts).Resolve those errors, and then try the operation again"Test agent fails to start with the error "Could not register TCP channel: System. No authority could be contacted for authentication.If you still observe this problem, contact your team project collection administrator.:8080/tfs/Default Collection.Make sure that the test controller is online, the firewall on the test controller is not blocking the connection, and the Team Foundation Server has required permissions to connect to the test controller:8080/tfs/Default Collection'.