Hi there!

I am an end user for SmarterMail and as the primary admin I have set up a shared calendar for a user group ("family"), which has 'manage' capabilities set. All family units are members of this group and a single user (my main account) was shared the calendar directly, in addition to the group. Local apps with various deviced (I tried iOS calendar, macOS calendar, eM client & Thunderbird) are connected via CalDAV to this shared calendar.

My problem: When I create an event on this shared calendar, it is propagated to the other devices, as it should be. However, when I delete this event on a device, this change is not synched back to the shared calendar or even reappears immediately (in eM's case). No errors in the logs (where I could find them, which was only eM & thunderbird). 

Any idea what could cause this and how to change this behaviour? 'manage' should include read/write acces and deletions, correct? SmarterMail is version "SmarterMail Enterprise, Build 9371 (Aug 28, 2025)"                    

Thanks!