The DRS_MSG_EXISTREPLY_V1 structure defines the response message received from the IDL_DRSGetObjectExistence method.

 typedef struct {
   DWORD dwStatusFlags;
   [range(0,10485760)] DWORD cNumGuids;
   [size_is(cNumGuids)] UUID* rgGuids;
 } DRS_MSG_EXISTREPLY_V1;

dwStatusFlags: 1 if the digests of the object sequences on the client and server are the same, 0 if they are different.

cNumGuids: The number of items in the rgGuids array. Zero if dwStatusFlags = 0.

rgGuids: The objectGUIDs of the objects in the server's object sequence.