Thanks,
Indeed no rule regarding PromotionNotice was present in the policies.
However WcAdmin has full rights to all WTobjects and he couln't promote neither.
I added a rule with full control on promotion notices for the designers group at organization level, but it still fails.
At least, its looks like beeing managed by the essential version, but other settings are missing or wrong, I guess.
I keep on fighting...
Regards,