singleValueLegacyExtendedProperty resource type

Namespace: microsoft.graph


APIs under the /beta version in Microsoft Graph are subject to change. Use of these APIs in production applications is not supported. To determine whether an API is available in v1.0, use the Version selector.


Existing apps that use this feature with Outlook tasks should be updated, as Outlook tasks are being deprecated. See To Do APIs in public preview for more information.

An extended property that contains a single value.

See Extended properties overview for more information about when to use open extensions or extended properties, and how to specify extended properties.


Method Return Type Description
Post A supported resource instance: message, mailFolder, event, calendar, contact, contactFolder, Outlook task, or Outlook task folder, but not group post. Create a singleValueLegacyExtendedProperty in a new or existing instance of a supported resource.
Get One or a collection of supported resource instance (message, mailFolder, event, calendar, contact, contactFolder, Outlook task, Outlook task folder, or group post), or one such instance expanded with a singleValueLegacyExtendedProperty object. Get a resource instance with an extended property using $expand or $filter.


Property Type Description
id string The property identifier. Read-only.
value string A property value.



JSON representation

Here is a JSON representation of the resource.

  "id": "string (identifier)",
  "value": "string"