Tom works as the Desktop Administrator for www.company.com Inc. Some employees work at home and all computers are configured with Windows 7 Professional that will be networked together. The computers need to have access to their files when they are not connected to the company network. In the past, the computers have had problems maintaining the most recent version of documents because they used the process of copying from the network, making changes, and then later trying to remember to copy the modified files back to the network. They need a more reliable way to maintain the latest versions. They also would like to organize network files more easily into a single repository of different types of files rather than continuing to map to different drives. Which of the following options will Tom choose to overcome the problem?