I have just built a new Windows 2003 32-bit R2 SP2 and installed Exchange 2003 Ent with sp2. The system is a new Dell R710 which is 64bit hardware. My problem is that when I add just the /3GB switch to the boot.ini file the system crashes on boot at CTRL+ALT+Del and goes into a loop of rebooting and crashing. The same also happens with /3GB /userva=3030. The best I can tell the issue is probably related to 64-bit hardware running 32-bit software, but I don't know what to do.
Since I plan to add this Exchange 2003 to an existing Exchange 2000 Org, for the purposes of an interim step up to Exchange 2010, I really don't want to install a 64-bit version of the OS.
Any thoughtful comments appreciated.