.EDB File Extension
File TypeExchange Information Store Database
File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.
What is a EDB file?
Database created by Microsoft Exchange Server; serves as the main repository for the mailbox data saved by Exchange; stores both in-process and stored non-SMTP messages; formatted using a b-tree structure, which includes a top level node and many child nodes.
Priv1.edb and Pub1.edb are the main EDB files used for the Exchange information store. They each have a corresponding .STM file that contain SMTP messages.