They are cumulative, so sp4 is all you need. William Lefkovics, MCSE, A+
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Friday, October 19, 2001 8:02 AM To: MS-Exchange Admin Issues Subject: Exchange 5.5 I'm installing Exchange 5.5 for the first time. Do I need to install the previous service packs, or can I just install SP4 and it will cover all the updates? Thanks in advance. List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm