@rfc2822 Thanks again, I can confirm that this was a server issue which has been fixed accordingly. Since then Davroid is working flawlessly.
It would be great if a user could perform the same checks you had performed using the debug approach. Is this an option?
Restrict time range of syncronisation
as written here
This would be nice. Syncing my calendar takes quite a bit of time (30-60 seconds), presumably because it’s syncing years worth of information every time?
Ideally the initial (and perhaps a manual “full/force resync”) sync would sync the complete calendar history, but automatic syncs would only sync events >= one week ago or so.
It doesn’t sync the information every time but at least the ETag (hash) for every iCal.
Partial syncs will be a very challenging task, but I will have a look at it when other things are stable.