Microsoft Exchange server has earned the reputation of a business critical email servers as it brings forward better business management with more user specific features. The EDB file of the Exchange server is the place where all the user-specific data are stored. This storage facility has a size limitation of 16 TB on the Exchange Store Engine. In other words, you can say that the EDB databases are considered as the storage repository which holds the mailbox data. These storage files are have B-tree structure designed databse that allows for quicker access by users.