PidTagLastModificationTime Canonical Property

Applies to: Outlook 2013 | Outlook 2016

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.

See also

MAPI Properties

MAPI Canonical Properties

Mapping Canonical Property Names to MAPI Names

Mapping MAPI Names to Canonical Property Names