Q: Does every application that uses CDO require the "exchange CDO update"? I'm thinking of BES, LOB apps, and client-side scripts that use CDO 1.21 A: if you have apps that use CDO then you do need the appropriate CDO patch. The Exchange CDO patch is
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Read the complete post at http://blogs.technet.com/dst2007/archive/2007/03/01/does-every-application-that-uses-cdo-require-the-exchange-cdo-update.aspx