Thanks for the host name! I have tested it on my device and I can access it with DAVx⁵ without having to accept the certificate. So I’d need more information. Please provide verbose steps to reproduce (including operating system and software versions), Web server and CalDAV/CardDAV server logs taken while the problem occurs, DAVx⁵ debug info (DAVx⁵ / Settings / Debug info) and verbose DAVx⁵ logs etc as described in [READ BEFORE POSTING] What’s required to diagnose a problem.
I have a similar use case. I have restricted the sync to specific SSIDs, any chance it is possible to add an active VPN connection as a second criteria? I.e. Either VPN or specific SSID is sufficient to allow sync.
@devvv4ever the notification is sent by opentasks, and yes, the notification is for a task that is past due, I am usually setting due for tasks to remind me at that time, the notification pops up on due date/time which is fine, but then when I do not clear that notification, it pops up again on every sync, like it was a new notification, but it isn’t, it’s still the same one which has already been there for some time.