offline(Pertaining to a user who, during business hours (or at any time if no business hours have been set), is not signed in to any Lync or Communicator, or IM device and cannot be contacted by phone (no call forwarding information is published))
Appear offline(The status menu item that makes it appear to the user's contacts that he or she is currently offline); Offline(Pertaining to a user who, during business hours (or at any time if no business hours have been set), is not signed in to any Lync or Communicator, or IM device and cannot be contacted by phone (no call forwarding information is published))
disconnect(To break a connection); turn off(To remove power from a computer (or other device), either by a physical switch or through operating system software)
