first of all a BIG thank you and respect for the developer of DavDroid - really a fantastic App!
I refer to this tutorial page: https://www.davdroid.com/tested-with/synology/
The address to connect to the Synology didn’t work for me, the correct address should be:
My Synology is updated to the latest version of DSM 6.1.
Maybe there are other versions of DSM where the URL mentioned in the tutorial actually works, but I would be suprised. Suggest to correct it, or place a hint to the other spelling possibility.