We have 2 seperate company's operating from the same location. Both have Windows 2003 Active Directory Domains that are physicaly seperated in all aspects. There is now a requirement to have an application that runs on Domain XXX to be accessible to users on domain YYY. Users on domain YYY need to access this application on computers connected to Domain XXX.
The switches for both Domains are located in the same cabinet (Cisco Catalyst).
What solutions are availible to give users on YYY access to the application on XXX without giving them access to any other applications on XXX and ensuring they still have full access to all there own applications on YYY.