I want to execute a command via the cmd and the folder where I want to do that is a network-mapped drive E:.

Using the cmd, I would like to change to the directory, but getting an error:
C:\>e:
The system cannot find the drive specified.
C:\>cd e:
The system cannot find the drive specified.
C:\>cd /D e:
The system cannot find the drive specified.
C:\>
Searching on SO for similar problems, I came across a post that mentions using pushd:
C:\>pushd /D \\vboxsrv
The network name cannot be found.
Any tips?