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• 04-24-2008, 7:34 PM

  hevnbnd Joined on 04-22-2008, 2:55 AM Posts 15

  exchange 2007 sp1 kills my iis application how to fix? Reply Contact Hello, I figure this is an easy fix, but I can't seem to find it.  For some reason as soon as I installed exchange i got this error in my application in ie. HTTP Error 500.0 - Internal Server Error Calling LoadLibraryEx on ISAPI filter "C:\Program Files\Microsoft\Exchange Server\ClientAccess\owa\auth\owaauth.dll" failed Module IIS Web Core Notification Unknown Handler ISAPI-dll Error Code 0x800700c1 Requested URL http://localhost:80/dplive/dplive.dll/login Physical Path C:\Scanlon\dp50\dplive\bin\dplive.dll\login Logon Method Not yet determined Logon User Not yet determined   For some reason it suddenly starts loading the isapi filter for owa instead of my dll... Any ideas?

• 04-24-2008, 7:40 PM

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  anilr Joined on 05-23-2006, 10:13 PM Redmond, WA Posts 2,343

  Re: exchange 2007 sp1 kills my iis application how to fix? Reply Contact This means that you have 32-bit OWA filter configured for 64-bit worker process (or vice-versa) - find the line for this filter in the isapiFilters section in %windir%\system32\inetsrv\config\applicationhost.config and add a preCondition="bitness32" or preCondition="bitness64" as the case may be. Anil Ruia Senior Software Design Engineer IIS Core Server

• 04-24-2008, 7:44 PM

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  hevnbnd Joined on 04-22-2008, 2:55 AM Posts 15

  Re: exchange 2007 sp1 kills my iis application how to fix? Reply Contact This is all that i have in applicationhost.config under isapifilters <isapiFilters>             <filter name="ASP.Net_2.0.50727.0" path="%windir%\Microsoft.NET\Framework\v2.0.50727\aspnet_filter.dll" enableCache="true" preCondition="bitness32" />             <filter name="ASP.Net_2.0.50727-64" path="%windir%\Microsoft.NET\Framework64\v2.0.50727\aspnet_filter.dll" enableCache="true" preCondition="bitness64" />         </isapiFilters>   Should i have another one for my dll?

• 04-24-2008, 7:48 PM

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  anilr Joined on 05-23-2006, 10:13 PM Redmond, WA Posts 2,343

  Re: exchange 2007 sp1 kills my iis application how to fix? Reply Contact You dll is an ISAPI extension, so should not be in the isapiFilters list.  The OWA isapi filter is probably either in a location tag in applicationhost.config (look for another isapiFilters section in applicationhost.config) or it is in web.config for the root app for the website. Anil Ruia Senior Software Design Engineer IIS Core Server

• 04-24-2008, 7:51 PM

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  hevnbnd Joined on 04-22-2008, 2:55 AM Posts 15

  Re: exchange 2007 sp1 kills my iis application how to fix? Reply Contact UPDATE ok If i change these two isapifilters in the applicationhost.config it fixes my problem. <isapiFilters>                 <clear />                 <filter name="Exchange OWA Cookie Authentication ISAPI Filter" path="C:\Program Files\Microsoft\Exchange Server\ClientAccess\owa\auth\owaauth.dll" enabled="true" preCondition="bitness64"/>                 <filter name="Exchange ActiveSync ISAPI Filter" path="C:\Program Files\Microsoft\Exchange Server\ClientAccess\sync\bin\AirFilter.dll" enabled="true" preCondition="bitness64"/ />             </isapiFilters>  Why did this happen and is there a way to fix it through the gui instead of in the applicationhost.config file?

• 04-24-2008, 8:14 PM

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  anilr Joined on 05-23-2006, 10:13 PM Redmond, WA Posts 2,343	Re: exchange 2007 sp1 kills my iis application how to fix? Reply Contact You probably need to add a bitness64 precondition for the other filter in there also. Anil Ruia Senior Software Design Engineer IIS Core Server

• 04-24-2008, 8:26 PM

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  hevnbnd Joined on 04-22-2008, 2:55 AM Posts 15	Re: exchange 2007 sp1 kills my iis application how to fix? Reply Contact THANK YOU very much for your help. It is there for both and working. So why does this happen and again can this be fixed without editing the applicationhost.config

• 04-24-2008, 8:33 PM

  In reply to

  anilr Joined on 05-23-2006, 10:13 PM Redmond, WA Posts 2,343

  Re: exchange 2007 sp1 kills my iis application how to fix? Reply Contact IIS7 is the first IIS version to support running 32-bit and 64-bit wps side-by-side (IIS6 did not support this) - this is why we have introduced pre-conditions to allow someone to specify configuration for 32-bit vs 64-bit worker processes - I guess exchange setup needs to be updated to take advantage of this. Anil Ruia Senior Software Design Engineer IIS Core Server

• 05-07-2008, 9:17 PM

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  Halinab Joined on 10-01-2005, 9:02 AM Posts 13

  Re: exchange 2007 sp1 kills my iis application how to fix? Reply Contact I get the same error and applied the bitness64 to my isapi filters and my website works again but I can't say the same for owa.  I get the windows creditentials propts screen than blank (or a blue line down the middle) no owa login screen.  Don't know if owa would have worked by itself as I migrated the existing website from iis6.0 first.