How to map a drive to another domain using command prompt?

How can I map a drive to another server on another domain using net use? I tried using these commands but they didn't work. Currently our company is setup with OpenVPN if this matters

net use H: \\servershare /user:domainuser password /persistent:yes

net use n: \\servernamesharename /user:username@domainname password

net use n: \\servernamesharename /user:domainnameusername password

The user is able to see the folder but could not get in and she has her VPN open yet could not get in. I check the folder permisions in the server and everything looks ok from our end. Currently the user is located in Mexico. Is there any other way to do this? I would really appreciate if someone can help I already spent a couple hours searching, but I haven't had success.

From serverfault

• you need a \ to separate the domain & user,

  e.g. DOMAIN\USER

  net use n: \\servername\sharename /user:domainname\username password
  

  From lalalalalalala

• Remember that the vpn software may be blocking smb traffic, as may be the server to which you are connecting.

  If the server is, say, windows 2008 and it has a firewall rule to allow smb connections from the localsubnet but not from other subnets then your connection will fail.

  If you want more info you'll have to specify what you mean by 'didn't work'

  From Ian