Just recently I started having Exchange shut itself down because we reached the 18 GB limit. As a result I had everyone delete as much of their old email as possible. Altogether we've deleted about 5 GB.
However, running the Exchange Best Practices Analyzer tells me that my Mailbox Store is still 20 GB. Why does it still think that it is 20 GB? I thought that Exchange defragmented itself everyday so I just assumed this problem would go away once we all deleted a lot of email.
I know there is a registry entry I can add to increase the limit but I wanted to find out why it hasn't fixed itself before I went ahead and made that modification. Also I'd like to find out how to get an accurate count of the Mailbox Store. What do I need to do?