Hello Our environment is Exchange 2007 SP2 with CCR nodes. We have seperate servers for MBX, CAS, HT etc. I would like to know if we are performing well within our capacity, if we can add more mailboxes, how many more mailboxes we can add to each MBX server etc. Does anyone know how to measure this?

The best way to estimate MBX capacity is to use the Storage Calculator. See below: http://msexchangeteam.com/archive/2007/01/15/432207.aspxTim Harrington - Catapult Systems - http://HowDoUC.blogspot.com