1. A system for validating a user on an application server, comprising: an application server; at least one application running on the application server, each application having an access mechanism through which an external user can access at least one of the application and application server; and a validation mechanism for validating an external user gaining access through an access mechanism, the validation mechanism switching the identity of a validated external user to an internal user identity recognized by said at least one application running on the application server.