.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 an 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.