I'm not sure if I have the correct forum or not, but I needed to start someplace. I have a user that has their caching mailbox size at 6.85GB, yet when they switch the mode into their on-line mailbox the size is 13.1GB. My initial thoughts were that when the mailbox maintenance was run it would clean up the users online mailbox to match the caching size. Is there something in the weekly maintenance that is being missed, or can someone explain the differences between the online and caching mailbox sizes?

Thank you,