This is a SharePoint 2016 system. No matter in what library, clicking on "open with explorer" does nothing - no error, no action. This is a problem for all users (IE11 on win10, mostly, but also on win8.1, server 2012/2008).
Thing is, if we copy the browser address bar and paste it into file explorer, it works, so at least we have a workaround, but then again reauthenticating is required.
With a cleanly setup SharePoint test system, it does not work, either, but at least we get this:
That test system has not seen any patch yet, maybe that is why it is "failing a little less".
The usual suspects were tried:
- service "web client" is running at the clients
- server is added to trusted sites in IE
- registry settings from New document is saving in local machine instead in library (AuthForwardServerList)