Description:

This service pack includes fixes to server issues that were previously available as Microsoft Quick Fix Engineering (QFE) patches. SP4 is a cumulative release that contains all of the updates for Exchange Server 5.5 to date, including from SP3.

Download link is for Core Server Netsetup, other SP4 files:

• Support Directory, except Symbols, 25.8 MB
• Symbols, 11.8 MB
• Chat Server, 16.3 MB
• Documents, 7 MB
• Calendar Connector, GroupWise Connector, and Notes Connector, 16.9 MB
• IBM Professional Office System (PROFS) Connector and SNA Distribution Services (SNADS) Connector, 15.8 MB
• Symbols for all connectors in Exchange Connector 1 and Exchange Connector 2, 3.5 MB
• Forms Converter, 3.5 MB
• MSOUTL (chedule+ Driver) and Address Book Templates, 15 MB
• Win16 clients for I386, 18.3 MB
• Win16 clients for i386, 16.8 MB
• Outlook Web Access Client Language Packs, 14.2 MB