So here was the solution for me coming from synology assistance (Malek was super nice to help me):
1/ On the NAS, in control panel, “external access”, tab DDNS : create a synology address… it will be something like that: <name>.synology.me
2/ On the NAS, Set a fixed ip address on the local network to the nas : to do that, go to control panel/network/tab:network interface and modify the LAN line “manual ip config” the line IP address with the number you want (for me 192.168.1.24)
3/ on your box, open ports 5001 (connect to it through its local address and modify its NAT configuration. open a port for your nas in TCP port 5001
so here, the nas is accessible fro the outside on its caldav
4/ on the android DAV5X, open it, add a account, select URL and there add put the URL: https://<name>.synology.me:5001/caldav/<your_id>/aiioyb/
and enter your <your_id> and your password (the one to connect to your nas, at the id session).
Server returns 404 on REPORT calendar-query
I am running in a problem with an new created calendar sync.
The new calendar was set up on my Synology Diskstation. I added the account and the new calendar was found on the server.
I started the sync. and I’ve got a debug protocol
All my other calendars are working fine. I am confused.
thank you for the report. can you maybe attach the log file via upload, it’s abit corrupted and barely readable
One thing is strange…
I can find something about a Calendar “Firma” in it. I have also a Calendar with this name, but not associated with this one.
Unless you have deleted
http://dg3ic.dyndns.org:5005/web/Kalender/T+HP/and it so doesn’t exist anymore, this is a server problem. Please contact your vendor.
When I create the calendar ist shows up and I can choose it. As soon as I start the sync I get this message.
@DG3IC So the server returns a 404 message. There’s nothing I can do about it. Please contact your vendor.
I have just found out that Synology DSM CalDAV returns a 404 if there’s no entry yet (which is very wrong behavior).
So, adding an event (and task, if you use task lists) to the Synology DAVdroid account and then sychronizing fixes the 404 problem here. Maybe you can check this?