http://blogs.technet.com/b/ucedsg/archive/2008/09/17/customer-asks-how-can-i-ensure-that-messages-in-an-archive-are-tamper-proof.aspxI believe the real question is how can I prevent my organizations messages from being tampered. The answer is PKI. Public Key Infrastructure. In Exchange 2007 PKI is used for a number of things from self-signing on install to PKI for TLS for the Edgeen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.technet.com/b/ucedsg/archive/2008/09/17/customer-asks-how-can-i-ensure-that-messages-in-an-archive-are-tamper-proof.aspx#3126188Fri, 19 Sep 2008 21:42:48 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3126188subject: exchange<p>Using Sharepoint meeting workspaces with Outlook 2003 / 2007 Get the real scoop on the new Microsoft</p> <img src="http://blogs.technet.com/aggbug.aspx?PostID=3126188" width="1" height="1">http://blogs.technet.com/b/ucedsg/archive/2008/09/17/customer-asks-how-can-i-ensure-that-messages-in-an-archive-are-tamper-proof.aspx#3125247Wed, 17 Sep 2008 17:58:30 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3125247Blogs from the Microsoft Field<p>I believe the real question is how can I prevent my organizations messages from being tampered. The answer</p> <img src="http://blogs.technet.com/aggbug.aspx?PostID=3125247" width="1" height="1">