One of my clients is currently running an SBS 2003 server and the information store has grown to 75gb. We have been trying to sell them an upgrade to a higher version of Exchange for several months but they are not moving quickly enough. We have had them go through and delete emails and ran an offline defrag, which bought us some time but it is now full again. Now, two or three times a week we have to remount the information store in order for Exchange to be usable. Does anyone know if there is a point at which the database will no longer mount at all, or if it will begin dismounting more often than just once a day at 5 am?