During the specialize configuration pass of Microsoft® Windows® Setup, machine-specific information for the image is applied. For example, you can configure network settings, international settings, and domain information.
The specialize configuration pass is used in conjunction with the generalize Configuration Pass configuration pass. The generalize Configuration Pass pass is used to create a Windows reference image that can be used throughout an organization. From this basic Windows reference image, you can add further customizations that apply to different divisions within an organization or to different installations of Windows.
The following diagram illustrates how the specialize configuration pass is used to apply these specific customizations.
For example, during the specialize configuration pass, you can specify different home pages in Internet Explorer® for different departments or branches within your business. This setting will then override the default home page.