Exchange Server 5.5 Service Pack 4 Overview

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This service pack addresses server issues that were previously available as Microsoft Quick Fix Engineering (QFE) updates. Service Pack 4 (SP4) is a cumulative release that contains all of the updates for Exchange Server 5.5 to date, including the feature enhancements and utilities from Service Pack 3 (SP3). We recommend installing the service pack on all servers running Exchange Server 5.5.

Note: If you are using Microsoft Internet Explorer 3.02 or earlier, phone (800) 360-7561 to order your SP4 CD Kit.

For a complete list of issues addressed in SP4, see the following articles in the Microsoft Knowledge Base:

If you would like an exhaustive list of what was new in SP4, see the Readme.htm file included in the SP4 download.

For More Information

Get links to the top support downloads of service packs and service releases from the Microsoft Help and Support site.