How to Save Document to a WebDAV Server

Select Document > WebDAV > Save As...
The WebDAV Save As Dialog will show up. In the editbox Collection URL.. specify the URL with the path where the document resides and hit Enter.

Note:
Make sure you specify the path where the document resides, but not the document URL. E.g. if the document URL is http://myserver:8080/dav/project/1.xml, then specify: http://myserver:8080/dav/project/

The files residing in the DAV directory will then be shown.
In the editbox filename or in the file browser select the file to open. Click OK.