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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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Summary

When using Exchange Web Services, you can reference MAPI properties using extended properties. In this chapter, we discussed the three categories of extended properties—proptag, Guid+Id, and Guid+Name. Extended properties in the standard property identifier range can use only the proptag extended property representation while extended properties in the custom range must use either the Guid+Id or Guid+Name representation.

Next we discussed the difference between the metadata (PathToExtendedFieldUriType) and data representations of extended properties and how these two concepts are wrapped by the ExtendedPropertyType container. Using this, we saw how we could retrieve and set extended property values on items. We revisited managed folders ...

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