In this article, we will see how we can access a particular mailbox using Microsoft Exchange web services ?
The DistinguishedFolderId element identifies Microsoft Exchange Server 2007 folders that can be referenced by name. The DistinguishedFolderId class has an optional Mailbox property on it that allows you to indicate which mailbox you are accessing.
1: <DistinguishedFolderId Id="" ChangeKey="">
Note: A DistinguishedFolderId resolves to a FolderId. The schema that describes this element is located in the EWS virtual directory of the computer that is running Microsoft Exchange Server 2007 that has the Client Access server role installed.