1. A communications system comprising: a plurality of communications devices communicating with each other over a network; a storage on said network storing location and presence information about system users, each of said plurality of communications devices being identifiable with at least one system user; and an identity context reminder service monitoring location and presence status for said plurality of communications devices and comparing said monitored location and presence status for inconsistencies with stored said location and presence information, said identity context reminder service selectively providing a reminder to respective communications device of said plurality of communications devices responsive to an inconsistency.