I have just migrated my caldav calendar from synology webdav server app to the synology calendar app. No problems connecting and synchronizing, other than each time I snooze a calendar entry a new alert is added to the calendar entry. For example, the calendar event is created with 1 alert 15 min before the event; after I snooze the event the first time in Thunderbird the calendar event is updated then shows two reminders 15 min before the event, the second time it is snoozed then four reminders appear, etc. I'm not sure whether this is an issue on the Tbird side, or the Synology App side. Didn't have this problem when running it through the webdav server app. Nor does it appear to be a problem with old recurring calendar entries that were imported when I imported the calendar; it only seems to happen on new calendar entries. Anyone experience the same issue?