Article
09/29/2014

Deleting contacts by using the EWS Managed API 2.0

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.

You can use the Microsoft Exchange Web Services (EWS) Managed API to delete contacts.

To delete a contact

Bind to an existing contact by using its unique identifier. The following code shows how to bind to an existing contact and provide it with connection configuration information by using an ExchangeService object named service. The ItemId has been shortened to preserve readability.
```
Contact contact = Contact.Bind(service, new ItemId("AAMkA="));
```
Delete the contact. The following code shows how to delete contact and move the deleted contact to the Deleted Items folder.
```
contact.Delete(DeleteMode.MoveToDeletedItems);
```

Example

Deleting a contact

The following code example shows how to delete a contact and move the deleted contact to the Deleted Items folder. This example assumes that service is a valid ExchangeService binding. The ItemId has been shortened to preserve readability.

// Bind to an existing contact by using its unique identifier.
Contact contact = Contact.Bind(service, new ItemId("AAMkA="));

// Delete the contact and move the deleted contact to the Deleted Items folder. 
contact.Delete(DeleteMode.MoveToDeletedItems);

The following example shows the XML that is sent by using the Delete method. The ItemId and ChangeKey attributes have been shortened to preserve readability.

<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
                   xmlns:m="https://schemas.microsoft.com/exchange/services/2006/messages" 
                   xmlns:t=https://schemas.microsoft.com/exchange/services/2006/types 
                   xmlns:soap="https://schemas.xmlsoap.org/soap/envelope/">
   <soap:Header>
      <t:RequestServerVersion Version="Exchange2010" />
   </soap:Header>
   <soap:Body>
      <m:DeleteItem DeleteType="MoveToDeletedItems">
         <m:ItemIds>
            <t:ItemId Id="AAMkA=" ChangeKey="DwAAA" />
         </m:ItemIds>
      </m:DeleteItem>
   </soap:Body>
</soap:Envelope>

The following example shows the XML that is returned by using the Delete method.

<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:soap="https://schemas.xmlsoap.org/soap/envelope/" 
               xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
               xmlns:xsd="http://www.w3.org/2001/XMLSchema">
   <soap:Header>
      <t:ServerVersionInfo MajorVersion="14" MinorVersion="0" MajorBuildNumber="639" MinorBuildNumber="11" Version="Exchange2010" 
               xmlns:t="https://schemas.microsoft.com/exchange/services/2006/types" />
   </soap:Header>
   <soap:Body>
      <m:DeleteItemResponse xmlns:t="https://schemas.microsoft.com/exchange/services/2006/types" xmlns:m="https://schemas.microsoft.com/exchange/services/2006/messages">
         <m:ResponseMessages>
            <m:DeleteItemResponseMessage ResponseClass="Success">
               <m:ResponseCode>NoError</m:ResponseCode>
            </m:DeleteItemResponseMessage>
         </m:ResponseMessages>
      </m:DeleteItemResponse>
   </soap:Body>
</soap:Envelope>

Compiling the code

For information about compiling this code, see Getting started with the EWS Managed API 2.0.

Robust programming

Write appropriate error handling code for common search errors.
Review the client request XML that is sent to the Exchange server.
Review the server response XML that is sent from the Exchange server.
Set the service binding as shown in Setting the Exchange service URL by using the EWS Managed API 2.0. Do not hard code URLs because if mailboxes move, they might be serviced by a different Client Access server. If the client cannot connect to the service, retry setting the binding by using the AutodiscoverUrl(String) method.
Set the target Exchange Web Services schema version by setting the requestedServerVersion parameter of the ExchangeService constructor. For more information, see Versioning EWS requests by using the EWS Managed API 2.0.

Security

Use HTTP with SSL for all communication between client and server.
Always validate the server certificate that is used for establishing the SSL connections. For more information, see Validating X509 certificates by using the EWS Managed API 2.0.
Do not include user names and passwords in trace files.
Verify that Autodiscover lookups that use HTTP GET to find an endpoint always prompt for user confirmation; otherwise, they should be blocked.

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