I am a bit puzzled by the existance of the "Everyone" group in this policy.
The Everyone identity All interactive, network, dial-up, and authenticated users are members of the Everyone group. This special identity group gives wide access to a system resource.
All these constitutient identities, however, are only granted to a user if the user is currently logged on through that method.
Which makes me wonder, if I set Everyone as the only entry in this policy, does it mean only users already logged onto a computer (through other means) will be allowed access via network or does it mean anyone with a valid account will be allowed?
Similarly, if I put "Network" as the only entry, does it mean everyone or no one?