I don't think that the ** works as a template part, only in the compliance rule.
can you add HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces as a part recursively ?
then in the rule use the * or ** ?
worked as follow:
in the part section i've put:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces Registry Key
and the rule written as
Registry Value HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\** Must Exist AND ((String Value = "xxxxx") AND (Name = "NameServer"))