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Working with extended properties by using the EWS Managed API

EWS Managed API

Extended properties enable Microsoft Exchange Server clients to add customized properties to items and folders that are stored in an Exchange mailbox. Custom properties can be used to store data that is relevant to an object.

Last modified: October 13, 2012

Applies to: EWS Managed API | Exchange Server 2007 Service Pack 1 (SP1) | Exchange Server 2010

Note: This content applies to the EWS Managed API 2.0 and earlier versions. For the latest information about the EWS Managed API, see Web services in Exchange.

Extended properties can be created on the following items:

  • E-mail messages

  • Appointments

  • Tasks

  • Contacts

  • Distribution lists

  • Post items

  • Meeting messages

  • Meeting requests

  • Meeting cancellations

  • Meeting responses

  • Folders (standard)

  • Calendar folders

  • Contacts folders

  • Tasks folders

  • Search folders

An item can have multiple extended properties. The ExtendedPropertyCollection class contains a list of the extended properties that are associated with an item.

Creating custom extended properties by using the EWS Managed API

Viewing custom extended properties by using the EWS Managed API

How to: Update custom extended properties by using the EWS Managed API

Deleting custom extended properties by using the EWS Managed API

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