Microsoft KB Archive/233081

= XGEN: What's New in Microsoft Exchange Server Version 5.5 =

Article ID: 233081

Article Last Modified on 6/29/2007

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APPLIES TO


 * Microsoft Exchange Server 5.5 Standard Edition

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This article was previously published under Q233081



SUMMARY
This article describes the enhancements and new features included in Microsoft Exchange Server version 5.5.



Updated Database Structure for the Information Store and Directory
Exchange Server 5.5 uses an updated database that provides more robust data storage capabilities. Because of the new database structure, the information store is limited only by your system's hardware capacity.

Ability to Retrieve Deleted Items from Mailboxes and Public Folders
Users can now retrieve deleted items in mailboxes and public folders if you set a deleted item retention period for the information store, mailbox, or public folder. Users can recover deleted items by using the Recover Deleted Items command in Microsoft Outlook (R) version 8.03 or later. Recovered items are copied to the Deleted Items folder using mailboxes, or to the selected folder using public folders.

Writable LDAP
Exchange Server 5.5 enables users to make changes to the directory by using Lightweight Directory Access Protocol (LDAP). For information, see Microsoft Exchange Server Operations.

Enhanced Protocol Support for the Internet Mail Service
The Internet Mail Service supports the following protocols: ETRN, Secure Multipurpose Internet Mail Extensions (S/MIME), Secure Sockets Layer (SSL), and Simple Authentication and Security Layer (SASL).

Support for MHTML
Exchange Server 5.5 supports MIME Hypertext Markup Language (MHTML), which is the MIME encapsulation of aggregate documents, such as an HTML document with inline pictures.

Microsoft Exchange Scripting
You can install the Microsoft Exchange Event Service to support customized public folder workflow applications that you develop. For example, you can develop an application that performs an action when a specified event occurs in a public folder.

Container Level Search Control
You can restrict users' access to Address Book views. For example, if you are hosting multiple companies on a single Exchange Server computer, you can prevent users of one company from viewing the Address Book views of another company.

Support for Multiple and Differential Offline Address Books
Users can also download differential entries in offline Address Books, so that only changes that occurred since the last download are downloaded.

Advanced Security
You can set multiple password policies that prevent administrators from making changes to the Key Management (KM) server without authorization from one or more other administrators. Exchange Server also supports trusted messages sent between organizations so that users can verify the source of messages sent from another organization.

Microsoft Cluster Server Support
Microsoft Exchange Server supports Microsoft Cluster Server, which is included with Windows NT® Server. Microsoft Cluster Server provides fault tolerance in the event of hardware and software malfunctions. It ensures that if an Exchange Server computer fails, another is available so mail delivery is never interrupted. Microsoft Cluster Server must be installed on the Exchange Server computer to enable support for clustering.

NOTE: The Outlook Web Access component will not function correctly installed on a Microsoft Cluster Server.

Microsoft Exchange Chat Service
Exchange Server now includes chat services that enable users to interact with each other online, in real time.

SNMP Madman MIB
Exchange Server supports the Mail and Directory Management Management Information Base (MADMAN MIB) for use with Simple Network Management Protocol (SNMP) monitoring agents.

Lotus cc:Mail DB8 Migration
The Lotus cc:Mail source extractor supports Lotus cc:Mail version 5.x (DB6), and version 6.0 and version 8.0 (DB8).

Address Space and Routing Enhancements
Exchange Server gives you more control over message routing. The Address Space property page on connectors has been enhanced to enable scoping restrictions on each address space specified. Each address space can be configured so that the connector routes messages that originate from anyone in the organization, routes only messages that originate from within the home site, or routes only messages that originate within the home server location. In addition, each MTA can be configured to use only the least-cost routes to deliver mail, so that if the least-cost route is not accessible, messages are returned with a non-delivery report (NDR).

For more information or specific questions concerning Exchange Server, consult the Microsoft Knowledge Base online at http://support.microsoft.com/default.aspx

