http://blogs.msdn.com/exchangedev/archive/2009/06/15/exchange-impersonation-vs-delegate-access.aspxThere has been some confusion about the different methods that can be used to access a mailbox. Developers are asking: What method should I use? When should I use it? What are the differences between the different methods? This post will give you a quicken-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.msdn.com/exchangedev/archive/2009/06/15/exchange-impersonation-vs-delegate-access.aspx#9760127Tue, 16 Jun 2009 12:28:50 GMT91d46819-8472-40ad-a661-2c78acb4018c:9760127Explaining Exchange Impersonation vs. Delegate Access<p>PingBack from <a rel="nofollow" target="_new" href="http://www.ditii.com/2009/06/16/explaining-exchange-impersonation-vs-delegate-access/">http://www.ditii.com/2009/06/16/explaining-exchange-impersonation-vs-delegate-access/</a></p> http://blogs.msdn.com/exchangedev/archive/2009/06/15/exchange-impersonation-vs-delegate-access.aspx#9762436Tue, 16 Jun 2009 17:34:15 GMT91d46819-8472-40ad-a661-2c78acb4018c:9762436mstehle: The CDOs and CDONTS of Messaging Development<p>The Exchange API team has a new post to explaining the differences between using Exchange Impersonation</p>http://blogs.msdn.com/exchangedev/archive/2009/06/15/exchange-impersonation-vs-delegate-access.aspx#9832193Mon, 13 Jul 2009 22:50:27 GMT91d46819-8472-40ad-a661-2c78acb4018c:9832193James<p>When is this change coming? Ex 2010? &nbsp;Impersonation via MAPI still seems to work in Ex 2007 RU8.</p>