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Inside Microsoft® Exchange Server 2007 Web Services by Huw Upshall, Mark Taylor, Ben Spain, Michael Mainer, David Sterling

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Item Attachments

Now that you have a handle on file attachments, it is time to consider the second type of attachment that you will encounter on items: item attachments. As defined earlier in the chapter, an item attachment is an attachment that is itself an item. An e-mail attached to another e-mail is an item attachment. So, for example, say you created an e-mail message with a single file attachment. For this discussion, let’s call this original message Inner. Then you created a second message and attach message Inner to it. Let’s call this second message Outer. Figure 12-6 illustrates how message Inner is contained—or nested—within message Outer. Message Inner is an item attachment.

Figure 12-6. Nested attachments

Calling GetItem on message ...

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