Internet Authentication Service

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.