How do I change to a mapped network drive at the command line?

You need to make sure that the drive is mapped under the user which is running the command prompt. Try typing net use U: and see what info it gives you. If it's not showing the drive as being mapped, try remapping the drive (net use U: \\servername\share\path\).

You can also try changing directories by using cd /d U:, rather than just U:. This won't help you though if the network path doesn't exist.

CD if in the user account where drive is mapped.If you are in a Elevated Command you are no longer in the mapped user account.

Win 7: net use U: \servername\share\path\

win 8: pushd \servername\share\path\