Internet Security and Acceleration Server
(ISA Server) is compatible with most of the authentication methods that can be used with Entourage 2008. However, you cannot use forms-based authentication when Entourage 2008
is used with ISA Server
2004. For information about how to use forms-based authentication in an ISA Server
environment, see
You cannot access your mailbox on an Exchange Server 2003 front-end server by using Entourage 2004 for Mac (KB909268)
in the Microsoft Knowledge Base (support.microsoft.com).
For more information about ISA Server, see the
Microsoft Internet Security and Acceleration Server on the the Microsoft Web site (www.microsoft.com/isaserver).
If you provide secured external access to the Global Address List (GAL), you might prefer not to open ports for LDAP searches through ISA Server. Instead, you can host a copy of the GAL on an Active Directory Application Mode (ADAM) server that is exposed to the Internet for Secure Sockets Layer (SSL) access. For more information about ADAM, see
Introduction to Windows Server 2003 Active Directory Application Mode on the Microsoft Web site (www.microsoft.com).
When you use an ADAM server to provide GAL access, your Entourage users who are located outside of corporate network will not be able to browse GAL like an Entourage user who is connected directly to a Microsoft Windows Server 2003 based Global Catalog Server inside the corporate network.
