OK... I have no idea what I need!
I have a friend who has a business and he works from home and his partner works at a different house. What they want is a what I call a virtual server or from google a VPN? So they can access a files with each other and then for example one person saves a file then the other person accesses the file they will see the updated doc, or when they try and access the file when someone is in the file it warns the other user. So this is like when I am on my network at work when I try and access a file when someone is in it, it will not allow me to save the document.
The two people are not massively technically minded, but are more then competent on a windows machine. I would say I have good technical ability in the sense I have my own websites and use cpanel / ftp etc so I am sure I can set things up and help them out.
Could anyone recommend what is needed?