I'm not getting a 404 error i am getting a configuration error i tried the config.old and still nothing here is all the information it gives me.

Server Error in '/ecp' Application.

Hi,

This issue may be caused by BinSearchFolders path setting incorrectly. Please take the following steps to solve this issue.

1. Open IIS >> Exchange BackEnd website >> ECP virtual directory >> In the Middle Pane >> Application Settings >> BinSearchFolders
2. Change the path with C:\Program Files\Microsoft\Exchange Server\V15\bin;C:\Program Files\Microsoft\Exchange Server\V15\bin\CmdletExtensionAgents;C:\Program Files\Microsoft\Exchange Server\V15\ClientAccess\Owa\bin
3. Then reset IIS to check this issue.

Best Regards.

• Marked as answer by Simon_WuMicrosoft contingent staff, Moderator Tuesday, December 02, 2014 1:51 AM

You are exactly right. Thank you for the help. My 2013 Exchange server had this issue after the latest cu8 security update.
THANK YOU!