Unfortunately the answer to this question is restore the server to it's pre-sp4 state (whatever that was).
That includes your information store as it must be the same version of your Service Pack (meaning you can't restore the bins to sp3 and expect your sp4 store to work--or any post sp4 upgrade backups for that matter--the indexes get marked on sp level for obvious and also somewhat mysterious reasons)... there are some more radical alternatives... but that's the only straight forward one in my opinion. There is no uninstall on Exchange Service packs like there is for OS SPs. SP4 has been great for us, however. Josh -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Thursday, December 06, 2001 7:57 AM To: Exchange Discussions Subject: how do i uninstall exchange 5.5 SP4 hi!..how does one remove exchange SP 4? Rajeev Krishnan Tata Technologies, Mumbai Phone: 5837585 Fax: 5804021 _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED]

