Ok,
Seems like a mis-understanding on my part so I apologise for this, I fully understand that people can only give/make suggestions on forums and for that I am also grateful...
Here might be a better example...
All users are on Server A
The intranet is on Server B
Server A is very restrictive (to which we are not able to fully modify because it's managed by an external IT contractor)
Server B is our own server which we are running the web server from here...
When a user logs onto Server A all that they are required to do is click onto the internet -> this should then take them into the intranet (from here there windows logon name will be displayed as well as many directories being shown to them)
We are simply trying to test to see if a user is able to read/write files which could either be on Server A, B or a different server entirely....