Hi Dariusz,
How old is pretty old?
HPs latest BIOS is 02.20 but cannot be downgraded, but I believe 11.0.0.1205 is the latest ME firmware.
I don't think that AMT is sending a SecurityAlerts when the admin password is changed - reckon it should be.
C:\config-amt>amt_version.py
chzrhpmd001 10.30.32.60 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd002 10.30.32.14 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd003 10.30.32.27 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd004 10.30.32.15 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd005 10.30.32.148 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd006 10.30.32.149 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd007 10.30.32.53 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd008 10.30.32.51 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd009 10.30.32.150 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd010 10.30.32.75 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd011 10.30.37.164 no ping response
chzrhpmd012 10.30.32.155 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd013 10.30.32.153 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd014 10.30.32.135 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd015 10.30.32.40 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd016 10.30.32.158 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd017 10.30.32.160 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd018 10.30.32.42 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd019 10.30.32.162 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd020 10.30.32.43 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd021 10.30.32.52 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd022 10.30.32.166 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd023 no ip address
chzrhpmd024 10.30.32.24 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd025 10.30.32.129 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd026 10.30.32.21 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd027 10.30.32.47 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd028 10.30.32.183 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd029 10.30.32.57 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd030 10.30.32.187 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd031 10.30.32.181 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd032 10.30.32.68 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd033 10.30.32.190 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd034 10.30.32.195 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd035 10.30.32.164 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd036 10.30.32.38 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd037 10.30.32.198 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd038 10.30.32.196 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd039 10.30.32.197 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd040 10.30.33.12 N21 Ver. 02.19 06/01/2016 11.0.0.1205
chzrhpmd041 10.30.32.30 N21 Ver. 02.19 06/01/2016 11.0.0.1205
Kind regards
Duncan