Systems and methods are described for remotely managing mobile devices provided by an enterprise. Embodiments are described in which a client is provided to a mobile device whereby the client maintains a list of authorized contacts authorizes connections of the mobile device based on the list. The client responds to commands including commands to delete the list, prevent access to the list and synchronize the list. An administrative function is described for organizing users into groups, each user having access to a mobile device and each group being associated with a list of authorized contacts common to each user in the group.