Received the following in my samba logs. Any ideas what all this means? I'm used to seeing the SPN's from time to time. Never the DsCrackNames one. [2015/05/16 12:24:21.998389, 0, pid=1137, effective(0, 0), real(0, 0)] ../source4/rpc_server/drsuapi/writespn.c:237(dcesrv_drsuapi_DsWriteAccountSpn) Failed to modify SPNs on CN=PFRECSUP,OU=Computers,OU=staff1,OU=sup,OU=PF,DC=domain,DC=local: error in module acl: Constraint violation during LDB_MODIFY (19) [2015/05/16 12:31:24.982134, 0, pid=1137, effective(0, 0), real(0, 0)] ../source4/rpc_server/drsuapi/writespn.c:237(dcesrv_drsuapi_DsWriteAccountSpn) Failed to modify SPNs on CN=BKWS,OU=Computers,OU=staff2,OU=sup,OU=PF,DC=domain,DC=local: error in module acl: Constraint violation during LDB_MODIFY (19) [2015/05/16 12:31:30.791152, 0, pid=1137, effective(0, 0), real(0, 0)] ../source4/rpc_server/drsuapi/writespn.c:237(dcesrv_drsuapi_DsWriteAccountSpn) Failed to modify SPNs on CN=BKWS,OU=Computers,OU=staff2,OU=sup,OU=PF,DC=domain,DC=local: error in module acl: Constraint violation during LDB_MODIFY (19) [2015/05/21 09:55:38.774000, 0, pid=1137, effective(0, 0), real(0, 0)] ../source4/rpc_server/drsuapi/dcesrv_drsuapi.c:449(dcesrv_drsuapi_DsCrackNames) DsCrackNames: Unsupported operation requested: FFFFFFF8DsCrackNames: Unsupported operation requested: FFFFFFF8DsCrackNames: Unsupported operation requested: FFFFFFF8DsCrackNames: Unsupported operation requested: FFFFFFF8DsCrackNames: Unsupported operation requested: FFFFFFF8DsCrackNames: Unsupported operation requested: FFFFFFF8DsCrackNames: Unsupported operation requested: FFFFFFF8DsCrackNames: Unsupported operation requested: FFFFFFF8DsCrackNames: Unsupported operation requested: FFFFFFF8DsCrackNames: Unsupported operation requested: FFFFFFF8DsCrackNames: Unsupported operation requested: FFFFFFF8DsCrackNames: Unsupported operation requested: FFFFFFF8DsCrackNames: Unsupported operation requested: FFFFFFF8DsCrackNames: Unsupported operation requested: FFFFFFF8DsCrackNames: Unsupported operation requested: FFFFFFF8DsCrackNames: Unsupported operation requested: FFFFFFF8DsCrackNames: Unsupported operation requested: FFFFFFF8DsCrackNames: Unsupported operation requested: FFFFFFF8DsCrackNames: Unsupported opera +> tion requested: FFFFFFF8DsCrackNames: Unsupported operation requested: FFFFFFF8DsCrackNames: Unsupported operation requested: FFFFFFF8DsCrackNames: Unsupported operation requested: FFFFFFF8DsCrackNames: Unsupported operation requested: FFFFFFF8DsCrackNames: Unsupported operation requested: FFFFFFF8DsCrackNames: Unsupported operation requested: FFFFFFF8DsCrackNames: Unsupported operation requested: FFFFFFF8Failed to modify SPNs on CN=SCAN,OU=ADP,OU=Servers,OU=IT,OU=PF,DC=domain,DC=local: error in module acl: Constraint violation during LDB_MODIFY (19) -- -James