Hi! I have a quite difficult problem, we want to install the Exchange 2003 SP1 on a Windows 2003 SBS, where Exchange 2003 was installed on E-Drive and not on C-Drive. Everytime we try to install Exchange SP1 we got the error message, that SP1 Wizzard can't find the Exchange Installation! How can we solve this issue? it can't be a problem that exchange wasn't installed on C-Drive or not?` Thx for you help!