Several new projects are being staffed by outside contractors who will be working on servers in the contractors' office, not in the company building, and will have their own VPN server. The contracting company has informed your company that none of its people will be working weekends. What VPN controls can you set up to minimize contract employees' access to your network?

The VPN control that can be used to minimize employee's access to your network is, by enabling NAP VPN server which monitors client  computer trying to access your network, this is made possible by the NAP enforced client.

Explanation:

The VPN controls that can set up to minimize contract employees' access to your network is taken as follows:

The first step top take is to configure the Network Access Protection (NAP) allows an infrastructure to often check the client's computer if they are trying to get access to a network.

It is important such steps are taken for the overall protection of external threats and health of a network

Also we can state  some procedures and rules for a remote access by enabling the NAP VPN servers, that is to say, a client can be monitored for any kind or fishy activities, this is carried out by the NAP  client enforcement which will request access to a network.