1. A system to define and enforce policies on an Open Mobile Alliance Device Management (OMA DM) enabled mobile client device coupled to a server computer over a computer network, comprising: a server-side process configured to allow creation, modification and transmission of defined policies to the mobile client device; and a client-side process executed on the mobile client device and configured store the defined policies in an OMA DM management tree in the mobile client device as management objects, wherein each policy of the defined policies is represented as a subnode of the management tree.