I have no problems mounting a network drive W: with the following command:
sudo mount -t drvfs W: /mnt/htdocs
/proc/mounts the corresponding line then is:
W: /mnt/htdocs drvfs rw,relatime 0 0
But if I add this line to
/etc/fstab and restart, I would expect the system to auto-mount the drives, which doesn't happen.