Windows explorer access to openmediavault-webdav not working?

Hi,
I just installed the webdav-plugin 4.0 in my OMV 4.1.14, configured it and wanted to connect to the webdav share with windows explorer. However, this is giving me an error (as usual in Windows, the error message is not very comprehensive). I checked the nginx access log and found the following:

::ffff:192.168.1.49 - - [02/Dec/2018:00:27:29 +0100] "OPTIONS /webdav HTTP/1.1" 405 166 "-" "Microsoft-WebDAV-MiniRedir/6.1.7601"
::ffff:192.168.1.49 - - [02/Dec/2018:00:27:36 +0100] "OPTIONS / HTTP/1.1" 405 166 "-" "Microsoft-WebDAV-MiniRedir/6.1.7601"
::ffff:192.168.1.49 - - [02/Dec/2018:00:27:36 +0100] "PROPFIND /webdav HTTP/1.1" 405 166 "-" "Microsoft-WebDAV-MiniRedir/6.1.7601"

Both, OPTIONS and PROPFIND requests are rejected by nginx with 405 "Method Not Allowed". Is there anything I can do to get this working?

no idea anybody?

Looks like the issue with getting error 405 was on my side. No idea what I did but it seems to work now ...
Two issues I noticed however:

• I had to modify the rewrite directive in /etc/nginx/openmediavault-webgui.d/openmediavault-webdav.conf
  Old: rewrite ^/webdav/(.*)$ /webdav/index.php last;
  New: rewrite ^/webdav/?(.*)$ /webdav/index.php last;
  Without this modification, access to the DAV-Root does not work because there is no trailing '/' to match (e.g. https://davserver.net/webdav)
• Access to php files through webdav is not possible. I always get http error 404 "file not found".
  I believe this is because the location-directive "location ~ \.php$" in /etc/nginx/sites-available/openmediavault-webgui is executed BEFORE the rewrite-directive mentioned above. This means, the URI is directly passed to fastcgi without being rewritten.

Is there a way to fix issue #2?