HOW TO: Configure Exchange 2007 and Exchange 2010 for using Impersonation

Exchange 2010:

Configuring Exchange Impersonation (Exchange Web Services)
http://msdn.microsoft.com/en-us/library/bb204095.aspx

Using Exchange Impersonation XML Request/Response
http://msdn.microsoft.com/en-us/library/bb204088.aspx

Using Impersonation in EWS Managed API
http://msdn.microsoft.com/en-us/library/dd633680(EXCHG.80).aspx

Exchange 2007:

Configuring Exchange Impersonation (Exchange Web Services)
http://msdn.microsoft.com/en-us/library/bb204095(EXCHG.80).aspx

Using Exchange Impersonation (Exchange Web Services)
http://msdn.microsoft.com/en-us/library/bb204088(EXCHG.80).aspx

ExchangeServiceBinding Class – Code Sample
http://msdn.microsoft.com/en-us/library/exchangewebservices.exchangeservicebinding.aspx

Enjoy!