Does every application that uses CDO require the "exchange CDO update"?

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 specific to exchange. There is a client side CDO patch that you should look at.