PRF, Outlook Profile File (.prf)

The PRF Settings file format

PRF files are used to store user profile information for Microsoft Outlook, an e-mailing program for Windows. They contain information of an Outlook user and different e-mail preferences. PRF files are used to store all settings of an Outlook user profile to easily implement it in new Outlook installation on additional or new devices. That way, a user profile does not have to be set up anew but can easily be imported using a PRF file.

Technical details of PRF files

The PRF file format contains all kinds of information Microsoft Outlook needs to create and update a user profile; such as e-mail signatures and folders, account settings, references and more. The information is saved in a plain text format using a syntax that can be interpreted by Outlook. When importing a PRF file in Outlook, the settings of an existing user profile are automatically updated.

More information about the PRF file format

File extension .prf
File category Settings
Associated programs Microsoft Outlook (Windows & Mac)
Useful links More about customizing PRF files
Developer Microsoft