It will happen to you that a mapped network drives create with an elevated process cannot be visible to a unelevated process and vice versa.
To disable that isolation you can add a DWORD entry to the registry.
To do that open the registry by typing REGEDIT in the RUN COMMAND:
Navigate now to:
and create a new DWORD entry named EnableLinkedConnections with a value of 1.
Reboot your computer, now the network drives are accessible by all process!