TABLE 1: Major Features of Exchange 5.5
Scalability
Massive information stores	Have unlimited storage capacity
Support for MSCS (i.e., Wolfpack)	Cluster two Exchange servers to provide a highly resilient email service
Systems Administration
Deleted item caching and recovery	Recover deleted documents and messages without having to restore a complete server
Differential download for OAB	Download only items that have changed
SNMP Mail and Directory Management (MADMAN) Management Information Base (MIB)	Use the MADMAN MIB (defined in RFC 1566) withSNMP management consoles to help control Exchange servers in a distributed environment
Finer granularity for address space and message routing	Control how messages flow between different parts of the organization
Controlled view into the Global Address List (GAL)	Define which parts of the GAL that different users can view Host different companies in a single Exchange organization
Interconnectivity
Lotus Notes connector	Connect Exchange to Lotus Notes
IBM SNADS connector	Connect Exchange to IBM SNADS systems
IBM PROFS connector	Connect Exchange to IBM PROFS systems
Enhanced protocol support for the Internet Mail Service	Support for Simple Authentication and Security Layer (SASL) and MIME Hypertext Markup Language to encapsulate MIME content in HTML documents Increase control over Internet connections to improve messaging security
Writeable LDAP (LDAP 3.0)	Browse the Exchange directory Upgrade to LDAP 3 (when its released) to synchronize with other LDAP servers
Clients
Support for IMAP4 clients	Support for the latest Internet client protocol
Calendaring support for Web clients	Access Schedule+ and Outlook calendars from Web browsers
Enabling technology
Exchange Scripting Agent	Lay a foundation for workflow and document management applications
Miscellaneous
Microsoft Exchange Chat Service	Combine with an Internet Locator Server to hold online conversations