Oui, j'ai besoin d'une solution
To my surprise, I just detected that my policy serial numbers on SEPM and SEP clients are in local time again (here: UTC + 1) and not in UTC. SEP version is 12.1.5. I thought UTC (GMT) was used since SEP 11 RU7 MP1:
http://www.symantec.com/docs/TECH175626
Did Symantec re-changed this or is a bug in my system? At a glance, I did not find anything in release notes.