http://blogs.msdn.com/b/vijaysk/archive/2008/05/01/machinekeys-for-iis-7-0.aspxIIS uses MachineKeys for encryption. IIS 6.0 uses a particular key c2319c42033a5ca7f44e731bfd3fa2b5_GUID to do the encryption. If you have worked on IIS Admin start up issues the machine keys is one of the first things we check because if you do not haveen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.msdn.com/b/vijaysk/archive/2008/05/01/machinekeys-for-iis-7-0.aspx#8952446Mon, 15 Sep 2008 14:55:31 GMT91d46819-8472-40ad-a661-2c78acb4018c:8952446Uday<p>It seems that machine key's on Windows 2008 RTM is in following folder:</p> <p>C:\ProgramData\Microsoft\Crypto\RSA\MachineKeys</p> <p>Uday</p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=8952446" width="1" height="1">http://blogs.msdn.com/b/vijaysk/archive/2008/05/01/machinekeys-for-iis-7-0.aspx#8947094Fri, 12 Sep 2008 18:22:04 GMT91d46819-8472-40ad-a661-2c78acb4018c:8947094uday31in<p>Hi,</p> <p>Is there any way in IIS 6 and IIS 7 to transfer these keys across the server?</p> <p>Uday</p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=8947094" width="1" height="1">