You have to overwrite the default path (/remote.php/webdav) with this one: /nextcloud/remote.php/dav
Type: ownCloud
Accountinformationen
Accountname: nextcloud and FQDNS
Accounttyp: ownCloud
Accountkonfiguration
Server address: example.com
Server port: 443
Use SSL: Yes
Webdav base path: /nextcloud/remote.php/dav
Use Kopano credentials: Yes
Type: Webdav
Accountinformationen
Accountname: nextcloud and FQDNS
Accounttyp: Webdav
Accountkonfiguration
Server address: example.com
Server port: 443
Use SSL: Yes
Webdav base path: /nextcloud/remote.php/dav
Use Kopano credentials: Yes
It’s working with and without SSL and also with and without “use the Kopano credentials”.