Microsoft email database file
File type: Database file
An .oedb file is an email database used by Microsoft email software. It stores email data for the application that created it.
File type category:
Database file
Date updated: September 27, 2026
The OEDB file extension is used by applications developed by Microsoft. An OEDB file contains email database data used by the application to manage a mailbox.
It is part of the application's data store rather than an individual message file and is not intended to be opened as a standalone document. Its contents are application-managed, so manually editing it or opening it with an unrelated database program can damage mailbox data.
Open it through the Microsoft email application that created it. To move the email data, use that application's export or migration feature, if available.
Open an .oedb file through the Microsoft email application that created it. It is normally opened automatically as part of that application's mailbox data, rather than with a general-purpose database program.
An OEDB file is not normally converted directly with a generic file converter. Use the associated Microsoft email application's export or migration feature, if available, to move the mailbox data to a supported mail format or account.
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