Hi all, with the deadline to install the server with a trustable shutdown solution I forgot the Eaton IPM software and use an open source solution (NUT for Network UPS Tools). I have only one physical server using one UPS with a network management card. Maybe it can be difficult to make it run with many servers or UPS.
Also,I used the Eaton virtual appliance to install NUT Server on it (eliminate the need to install and configure a new linux server) its a return on investment after all the hours I passed to try to make Eaton IPM work !
If you are interrested you can follow this manual, it was very usefull but it is in French:
http://rene.margar.fr/2012/05/client-nut-pour-esxi-5-0/
I followed it to install onto vmware 5.5.