IAS Authentication and Windows Domain Modes
This section concentrates on IAS authentication features and behavior in different Windows domain modes. The information is useful when making decision about a particular domain mode in which IAS is deployed.
IAS is capable of authenticating access requests received through the RADIUS protocol against Windows 2000 native mode domains, Windows 2000 mixed-mode domains, Windows NT 4.0 domains, or Windows 2000 local accounts database for a stand-alone IAS server. The IAS authentication features and capabilities available to administrators depends on a mode of a particular domain against which the users authenticate.