Samsung S10, Android 10 / Windows 10 Version 1909
Android: Version 184.108.40.2063 / Windows 10: Version 6.4.2 (662) Windows Store x64
"Could not connect to the specified WebDav folder. Check your username and password."
But the password and username are correct. The synchronization worked fine before (with the same settings, password, username)
Yes it is. (In 24 hour format)
Yes it was displayed before the manual disconnection. Now after the dissconect of course not anymore.
I found the problem. Mailbox.org has somehow changed the URL for WEBDAV access.
At least this new URL works for me: https://dav.mailbox.org/servlet/webdav.infostore/Userstore/User Name (1)
Nevertheless thank you for your time!