1. A computer-implemented method for interacting between file security systems, the method comprising: creating, using a computing device, a first shared group at a first file security system; creating, using the computing device, a second shared group at a second file security system; permitting one or more users of the first file security system to be within the second shared group; permitting one or more users of the second file security system to be within the first shared group; creating, using the computing device, a third shared group; and permitting one or more users who are within both the first and second shared groups to be within the third shared group.