Batch Backup works, help with VPN

Hi guys, I wrote a question couple of days ago, which entiled me putting a pst.bat in the logoff script for various users in AD. This worked great and for selected users, their PST files gets backuped every time.

Only thing is we have a number of users that connect to our network via VPN for their emails, but as you can imagine the script is still running and causing problems for these users…

Can or is there a way in the bat file to check if the laptop is on our network/whether I can use the IF and GOTO commands to skip the sript if on vpn??

Many Thanks in Advance