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Important This document may not represent best practices for current development, links to downloads and other resources may no longer be valid. Current recommended version can be found here.

PidTagDepth Canonical Property

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Contains an integer that represents the relative level of indentation, or depth, of an object in a hierarchy table.

Associated properties:




Data type:



MAPI common

This property can also specify the categorization level of a row in a contents table or the hierarchy depth in a hierarchy table. The depth is zero-based, where zero represents the leftmost category. In all cases, the property value represents a relative value rather than an absolute value. In the hierarchy table, for example, the depth value is relative to the container from which the hierarchy table was retrieved. The depth does not represent an absolute depth from the root container.

Protocol Specifications


Provides references to related Exchange Server protocol specifications.


Includes permissible operations for the core table objects.


Specifies the properties and operations for lists of users, contacts, groups, and resources.

Header Files


Provides data type definitions.


Contains definitions of properties listed as alternate names.

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