Hello, After successfully installed Microsoft Exchange 2013 coexistence with Exchange 2007, I run into many problems. I am getting event ID 1023:Microsoft-Windows-Perflib: Windows cannot load the extensible counter DLL MSExchangeIS. The first four bytes (DWORD) of the Data section contains the windows error code. Event ID 6003: MSExchange Common: ConnectitityLog: Failed to create log directory: Access is denied to path. What kind of access permission do I give to the file directory? Jimmy Jimmy

Hello, For event id 1023, here is the article for your reference. Event ID 1023 -Performance Library Availability http://technet.microsoft.com/en-us/library/cc727009(v=ws.10).aspx If the event persists, I suggest you post the event id to windows server forum. http://social.technet.microsoft.com/Forums/en-US/winserver8gen/threads For event id 6003, please make sure that the path of the log directory does not contain any directory with read-only permissions. If you have any feedback on our support, please click here Cara Chen TechNet Community Support

Hello, Is there any update? If you have any feedback on our support, please click here Cara Chen TechNet Community Support

Hi Cara, It didn't help. I will call Microsoft for support. Thanks for try to help me.Jimmy