Browse for folder not showing network drives (Win 7)

I am using UE 4.12.5 on Windows 7. All of our assetts and files are stored on a local file server. I have a network drive mapped, so that a drive shows up in “Computer”.

Non of the “Browse for folder” dialogs in Unreal Editor show the mapped network drive though, so there is no way to select it to e.g. create a new project at that location or migrate a folder to a network location.

How can I use the network drive with UE4?