This book is geared toward Information Technology professionals who have moderate to high levels of exposure to firewall, security, and network technologies. It is ideal for those administrators who need a good in-depth knowledge of how ISA works and how it can be used to perform common tasks. In addition, this book is ideal for security administrators who are looking to deploy ISA as an additional layer of security in an existing environment, particularly for securing Outlook Web Access, websites, and other internal services.