Implementing Outlook 2010's group by conversation using EWS and Exchange 2007

Question

We\'re using EWS to generate some analytics on some of our mailboxes.

Part of this is getting a count/name/start/end of conversations. A conversation being analogou

Answer 1

You can fetch the ConversationId and the ConversationIndex via extended properties:

private static readonly ExtendedPropertyDefinition ConversationIdProperty = new ExtendedPropertyDefinition(0x3013, MapiPropertyType.Binary);
private static readonly ExtendedPropertyDefinition ConversationIndexProperty = new ExtendedPropertyDefinition(0x0071, MapiPropertyType.Binary);

var items = service.FindItems(WellKnownFolderName.Inbox, new ItemView(512) { PropertySet = new PropertySet(BasePropertySet.FirstClassProperties, 
            ConversationIdProperty, ConversationIndexProperty)});

Both are binary properties. Their content is described in great detail here:

[MS-OXOMSG]: E-Mail Object Protocol Specification, section 2.2.1.2 and 2.2.1.3.

The properties themselves are defined in [MS-OXPROPS]: Exchange Server Protocols Master Property List.