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PidTagLastModificationTime Canonical Property

Last modified: April 25, 2012

Applies to: Outlook

Contains the date and time when the object or subobject was last modified.

Associated properties:




Data type:



Message time

This property is initially set to the same value as the PR_CREATION_TIME (PidTagCreationTime) property. Attachment subobjects can update it as necessary by copying the last modification time maintained by the native file system. A client application can set this property until the first call to the IMAPIProp::SaveChanges method. From then on the provider should update PR_LAST_MODIFICATION_TIME during every IMAPIProp::SaveChanges call.

Protocol Specifications


Handles message and attachment objects.


Handles synchronizing messaging object data between a server and a client.


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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