ConversationId property vs ConversationIndex property in Exchange Web Services managed API

Question

EWS Managed API have two properties:ConversaionId and ConversationIndex

What is the difference between them? I guess ConversationId is the the Con

Answer 1

Correct, you can't access ConversationId in Exchange 2007.

The ConversationId identifies the conversation. The ConversationIndex represents the message’s position relative to the original message. ConversationId is not the ConversationIndex of the first mail. Here are some sample values I just grabbed off a new message.