Roles-based administration uses Microsoft Windows Authorization Manager. Creating and managing roles using the Administration Console requires the Authorization Manager MMC snap-in, which is only available on the following:
You can download the Administration Tools Pack from the following location:
http://www.microsoft.com/downloads/details.aspx?FamilyID=c16ae515-c8f4-47ef-a1e4-a8dcbacff8e3&DisplayLang=en