Active Directory
Active Directory is a collection of network resources that can contain users, computers, printers, groups, and even other Active Directories. Active Directory services allow administrators to handle and maintain all network resources from a single location, providing users access to the network resources they need to get their work done. Active Directory is a feature primarily of Microsoft Windows, although other operating systems can participate in it to a limited degree.
AD services control much of the activity that goes on in WCER’s network environment. In particular, they make sure each person is who they claim to be (authentication), usually by checking the username and password they enter, and allow them to access only the data they’re allowed to use (authorization).
In general, WCER users don't need to know how to configure their computers to connect to the SoE domain. If your device is provided by WCER, Research IT has configured this for you.