We are using Windows2003 Server with Exhange2000 SP3. We cant go to Exchange2003 becaus e off some Aplications (at the Moment). This Application uses IMAP to connect to Exchange. At the Moment IMAP Version: IMAP4rev1 server version 6.0.6249.0 is installed. We need the newer version: 6.0.633x wich is included in Service Pack Rollup Update: KB870540. But because of the "wrong" OS we can't install this Update. It always says that we having the wrong Exchange Version installed. How can we update only the IMAP services? Update Rollup for Exchange 2000 (KB870540) http://www.microsoft.com/downloads/details.aspx?FamilyID=363a57a4-8bed-4bbb-bbe4-abc11ab04611&DisplayLang=en Thanx for any Information Harald