An Exchange Information Store is a database. A Standard Exchange Server can host 3 Information Store databases. Each is a Jet database and can exist at its own file path and will have a .edb file extension. You can manually defrag an Exchange database using a tool called eseutil. In this case, you’ll encounter from 5 to 20 minutes of downtime per gig of the Information Store. You can run eseutil, Eseutil can be run to scan a database to determine whether an offline defragmentation is necessary. You can run eseutil to manually determine the space that could be saved with a defrag. To do so, run eseutil with the…