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MailItem.ConversationID Property (Outlook)

Returns a String that uniquely identifies a Conversation object that the MailItem object belongs to. Read-only.

Version Added: Outlook 2010

expression .ConversationID

expression A variable that represents a MailItem object.

This property associates items with a conversation. These items and the conversation all have the same value in their ConversationID property.

This property corresponds with the MAPI property PidTagConversationId.

If the MailItem object is created in a version of Microsoft Outlook earlier than Microsoft Outlook 2010, or if Outlook is running in online mode against a version of Microsoft Exchange Server earlier than Microsoft Exchange Server 2010, this property returns the same value as the ConversationTopic property.

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