ESEDB or the Extensible Storage Engine Database stores Exchange Server user mailbox data like emails, folders, message attributes, attachments, and more. The contents of an ESEDB file are accessed directly by Microsoft Exchange Server. Data within each table may consist of varying properties.
ESEDB are officially owned by Microsoft Corporation and can be opened within Exchange server or can be accessed using specific Email Clients
There are softwares that provide the easy and comfortable view of EDB files. Some softwares are mentioned below.