Hi Catharina,
Thanks for reporting these concerns, let’s take them in order.
Webdav
Credentials have changed. The old setup using your CERN account credentials was a security risk which we needed to address with the opportunity of these big changes.
For the moment, follow these instructions to find the new credentials: Access WebDAV [Temporary] - Drupal community
_site
This functionality is not available in the same place any longer. As we announced on the information meeting Oct 8 (presentation link), this will soon be offered through the new Webservices portal that our colleagues are building.
For the moment, most of the requests are serviceable through service-now (see presentation).
Not redirecting after sign in
This is a known minor frustration that we will fix in due time as resources in our team allow, but for the moment there is no workaround. It shouldn’t break any workflow, although I totally understand the annoyance.
Since all of these points are how the service behaves from now on, please let me know if there is any further issue with any of your website.