SMC Sophos Mail - New mail notification problem

Hi there *,

currently I have a big problem with the sophos mail client on all IOS Devices in our company.

Every device can receive new mails, calender entries and so on... no problem.

Only the notification from new news doesn't work.

The mail app reinstalled, configuration of the mail client reset - nothing worked. 

Please provide me a solution, if possible...

Infrastruktur details:

SMC Sever 9.6.5 with the last available SR patch

IOS Devices with differnet IOS firmware from 12.4.8 to 14.2

DEP, VPP works perfect, HTTPS certificate working

SMC rule / guideline for the Mail app - "Notification"  to System or App - both configurations doens't work

BR

Paddy ;)