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MAPI File Formats

Last modified: July 23, 2011

Applies to: Outlook

MAPI publishes the formats of various configuration files that clients and service providers use to describe message services and their service providers and forms.

The following table describes these files by name or type:

Configuration file



Contains configuration information for the MAPI subsystem, message services, and service providers.

Files with the .cfg extension

Contains configuration information for a form.

For detailed information about the file format of MapiSvc.inf, see File Format of MapiSvc.inf.

For detailed information about the file format of a form configuration file, see File Format of Form Configuration Files.

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