IIS 7 - Troubleshooting

Re: exchange 2007 sp1 kills my iis application how to fix?

Halinab — Thu, 08 May 2008 01:17:54 GMT

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.

Re: exchange 2007 sp1 kills my iis application how to fix?

anilr — Fri, 25 Apr 2008 00:33:50 GMT

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.

Re: exchange 2007 sp1 kills my iis application how to fix?

hevnbnd — Fri, 25 Apr 2008 00:26:08 GMT

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

Re: exchange 2007 sp1 kills my iis application how to fix?

anilr — Fri, 25 Apr 2008 00:14:06 GMT

You probably need to add a bitness64 precondition for the other filter in there also.

Re: exchange 2007 sp1 kills my iis application how to fix?

hevnbnd — Thu, 24 Apr 2008 23:51:13 GMT

UPDATE ok If i change these two isapifilters in the applicationhost.config it fixes my problem.

Why did this happen and is there a way to fix it through the gui instead of in the applicationhost.config file?

Re: exchange 2007 sp1 kills my iis application how to fix?

anilr — Thu, 24 Apr 2008 23:48:20 GMT

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.

Re: exchange 2007 sp1 kills my iis application how to fix?

hevnbnd — Thu, 24 Apr 2008 23:44:28 GMT

This is all that i have in applicationhost.config under isapifilters

Should i have another one for my dll?

Re: exchange 2007 sp1 kills my iis application how to fix?

anilr — Thu, 24 Apr 2008 23:40:21 GMT

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.

exchange 2007 sp1 kills my iis application how to fix?

hevnbnd — Thu, 24 Apr 2008 23:34:11 GMT

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?