Clients interact with the Middle tier, which contains:

• Web Cache

• Protocols for Email, Files, Web

• Services for Email, Files Calendar, Wireless, Portal, UltraSearch and Web Conferencing

Middle tier interacts with the Infrastructure and the Infostore, each supported by a database.

The Infrastructure holds:

• Directory Services

• Single Signon Server

• Calendar Server

• Database (directory, SSO, and Portal data)

The Infostore contains:

• Email

• Files

• UltraSearch

• Web Conferencing