I have resolved the owaauth.dll" and AirFilter.dll" erros by adding the bitness64 precondition to the applicationhost.config file. now if I go to http://10.240.116.1/owa/ it asks me to login then throws up a blank page with a blue line down the left side of the page. where the separator between mail folders and emails would be. if I go to localhost/exchange i get what is below. any ideas? HTTP Error 500.0 - Internal Server Error The page cannot be displayed because an internal server error has occurred. Detailed Error Information Module IsapiModule Notification ExecuteRequestHandler Handler AboMapperCustom-88333 Error Code 0x800700c1 Requested URL http://10.240.116.1:80/exchange Physical Path \\.\BackOfficeStorage\cmha-east.on.ca\MBX Logon Method Negotiate Logon User cmha\labellep

what version of Exchange? I would rebuild the Exchange virtual directories.

Need more information about the setup - so single server, multiple server, versions, patch levels of all servers involved. Simon.Simon Butler, Exchange MVP Blog | Exchange Resources | In the UK? Hire Me.

Hi Peter, For this issue, I suggest you follow these steps to troubleshoot the problem: 1. Please follow this kb to check for your issue (resolution 4). Error message when you visit a Web site that is hosted on IIS 7.0: "HTTP Error 500.0 – Internal Server Error" http://support.microsoft.com/kb/942031#top 2. Since you have changed “Enable 32-Bit Applicantions” to true, I suggest you change it back and then check for the issue. (restart the IIS after you change the value) Thanks, Evan Liu TechNet Subscriber Support in forum If you have any feedback on our support, please contact tngfb@microsoft.com Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Single install of Exchange 2007 on a windows server 2008 box all SP and roll ups applied. kb/942031#top fix did not change anything.

Hi Peter, Is there any related information in your event log? If so, please paste it in your next post. Thanks, Evan Liu TechNet Subscriber Support in forum If you have any feedback on our support, please contact tngfb@microsoft.com Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.