| Extension | File Type Developer | File Category | File Type Description | Software | Software Developer |
|---|---|---|---|---|---|
| .BAD | Microsoft Corporation | Text Files | Exchange Badmail File | Microsoft Exchange Server | Microsoft Corporation |
| .BDP | Microsoft Corporation | Text Files | Exchange Diagnostic Message | Microsoft Exchange Server | Microsoft Corporation |
| .BDR | Microsoft Corporation | Text Files | Exchange Non-Delivery Report Body File | Microsoft Exchange Server | Microsoft Corporation |
| .ECF | Microsoft Corporation | Plugin Files | Outlook Add-in | Microsoft Exchange Server | Microsoft Corporation |
| .EDB | Microsoft Corporation | Database Files | Exchange Information Store Database | Microsoft Exchange Server | Microsoft Corporation |
| .EFP | Microsoft Corporation | Data Files | Exchange Forms Designer Template | Microsoft Exchange Server | Microsoft Corporation |
| .FDM | Microsoft Corporation | Data Files | Exchange Forms Designer Form Message | Microsoft Exchange Server | Microsoft Corporation |
| .JRS | Microsoft Corporation | Backup Files | Extensible Storage Engine (ESE) Reserve Transaction Log | Microsoft Exchange Server | Microsoft Corporation |
| .JTX | Microsoft Corporation | Page Layout Files | XPS Document File | Microsoft Exchange Server | Microsoft Corporation |
| .MMF | Microsoft Corporation | Data Files | Microsoft Message File | Microsoft Exchange Server | Microsoft Corporation |
| .PAB | Microsoft Corporation | Data Files | Personal Address Book | Microsoft Exchange Server | Microsoft Corporation |
| .PST | Microsoft Corporation | Data Files | Outlook Personal Information Store File | Microsoft Exchange Server | Microsoft Corporation |
| .REQ | Open Source | Uncommon Files | SSL Certificate Request File | Microsoft Exchange Server | Microsoft Corporation |
| .RTE | Autodesk, Inc. | Data Files | Revit Project Template | Microsoft Exchange Server | Microsoft Corporation |
| .STF | Microsoft Corporation | Data Files | Exchange 2000 Server Temporary File | Microsoft Exchange Server | Microsoft Corporation |
| .STM | Microsoft Corporation | Data Files | Exchange Streaming Media File | Microsoft Exchange Server | Microsoft Corporation |
| .WEF | Microsoft Corporation | Data Files | Microsoft Exchange File System Format | Microsoft Exchange Server | Microsoft Corporation |
| .XNK | Microsoft Corporation | Uncommon Files | Microsoft Exchange Public Folder Shortcut | Microsoft Exchange Server | Microsoft Corporation |
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*Files that are not supported can be opened in binary format.
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