So I had just finished our SBS 2011 exchange 2010 setup a few days ago. We use a 1tb drive split into two partitions of 500gb ea. One is used for the OS and Exchange and the other for Data. After setting up exchange I discovered a few days later that Database had gone from about 10gb to over 300gb! I was finally able to get this back down to a reasonable amount by temporarily turn on circular logging and turning it off. This immediatly reduced the size of the database but need to know how to permenatly fix the issue as I am convinced it is goint to build quickly again.