A lot. I have same CPU and RAM with somewhere around 600 mailboxes and it doesn't come anywhere close to using available memory or CPU. I have a 40gig store or so currently. =20 -----Original Message----- From: msexchange-bounce@xxxxxxxxxxxxx [mailto:msexchange-bounce@xxxxxxxxxxxxx] On Behalf Of Mark Gordon Sent: Tuesday, March 23, 2004 1:07 PM To: msexchange@xxxxxxxxxxxxx Subject: [msexchange] exchange 2003 user size I need to know how many people can MS Exchange 2003 run on the following equipment dual xeon 2.8GHz 4GB RAM SAN connection (RAID 10, fibre channel) =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D Use the below link for Archives, and to set your preferences. http://thethin.net/exchangelist.cfm ===================== Use the below link for Archives, and to set your preferences. http://thethin.net/exchangelist.cfm