This is a very crude script to defrag (using eseutil) Exchange mailbox databases.
The script takes the database name as a mandatory parameter. It then dismounts the database, checks whether the database state has been shutdown cleanly, performs the defrag, verifies the state again, and finally, mounts it again.
Note that this is an offline process. The specified mailbox database will be offline, meaning that all mailboxes in the database will not be accessible until the process has been completed.