>Hi,
>
>I use mapped drives too, and found this same issue in Windows 10. Found this solution:
>
>1)Write the bellow lines in a mapped.reg file then run it:
>
>[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System]
>"EnableLinkedConnections"=dword:00000001
>
>2) Restart your computer.

Sounds like one of those which may be reset with every other windowses update. They already made that a non-default setting once, and they love to do it many times, without even telling you.