The DRS_MSG_EXISTREPLY union defines the response message versions received from the IDL_DRSGetObjectExistence method. Only one version, identified by pdwOutVersion^ = 1, is currently defined.

 typedef 
 [switch_type(DWORD)] 
 union {
   [case(1)] 
     DRS_MSG_EXISTREPLY_V1 V1;
 } DRS_MSG_EXISTREPLY;

V1: The version 1 response.