1. A method, comprising: displaying, by one or more computing devices, a user interface that displays one or more policy settings for a managed application that is to be made available for download to a mobile device, wherein each of the one or more policy settings provides a constraint to be enforced by the mobile device prior to the managed application being provided access to at least one resource that is accessible through an access gateway; receiving input via the user interface that creates or modifies a user authorization or user identification setting of the one or more policy settings, wherein the user authorization or user identification setting specifies a condition for authorizing or identifying a user in connection with the managed application being provided access to said at least one resource, and wherein the user authorization or user identification setting includes data specifying a ticket that is configured to provide authorization to create an application specific virtual private network (VPN) tunnel with the access gateway without requiring the user to provide credentials, an expiration period for the ticket, a manner in which the user is to log-on, or a certificate that is usable by the mobile device when responding to certificate challenges; producing a policy file for the managed application that includes the user authorization or user identification setting; and providing the policy file such that the policy is available for download to the mobile device.