Property Identifier Ranges

Office 2013 and later

Last modified: July 23, 2011

Applies to: Outlook

The following table summarizes the different ranges for property identifiers, describing the owner for the properties in each range.

Identifier range	Description
0000	Reserved by MAPI for the special value PR_NULL.
0001 - 0BFF	Message envelope properties defined by MAPI.
0C00 - 0DFF	Recipient properties defined by MAPI.
0E00 - 0FFF	Non-transmittable message properties defined by MAPI.
1000 - 2FFF	Message content properties defined by MAPI.
3000 - 3FFF	Properties for objects other than messages and recipients defined by MAPI.
4000 - 57FF	Message envelope properties defined by transport providers.
5800 - 5FFF	Recipient properties defined by transport and address book providers.
6000 - 65FF	Non-transmittable message properties defined by clients.
6600 - 67FF	Non-transmittable properties defined by a service provider. These properties can be visible or invisible to users.
6800 - 7BFF	Message content properties for custom message classes defined by creators of those classes.
7C00 - 7FFF	Non-transmittable properties for custom message classes defined by creators of those classes.
8000 - FFFE	Properties defined by clients and occasionally service providers that are identified by name through the IMAPIProp::GetNamesFromIDs and IMAPIProp::GetIDsFromNames methods.
FFFF	Reserved by MAPI for the special error value PROP_ID_INVALID.

The range between 3000 and 3FFF is reserved for properties that are not related to either messages or recipients. MAPI divides this range into sub-ranges by types of object; the following table shows this further breakdown.

Identifier range	Type of property
3000 - 33FF	Common properties that appear on multiple objects, such as PR_DISPLAY_NAME and PR_ENTRYID.
3400 - 35FF	Message store properties
3600 - 36FF	Folder and address book container properties
3700 - 38FF	Attachment properties
3900 - 39FF	Address book properties
3A00 - 3BFF	Messaging user properties
3C00 - 3CFF	Distribution list properties
3D00 - 3DFF	Profile properties
3E00 - 3FFF	Status object properties