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Getting a strange error in IIS

Posted on 2013-05-13
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Last Modified: 2013-06-03
Test enviironment with Windows 2008 R2 and Exchange 2010 SP3 installed. We have been playing around with authentication in IIS and SSL settings to get services to work through a load balancer. This is just test so no big issues. In IIS, when I click on the Public virtual directory and select Authentication, I get the error below:

There was an error while performing this operation.

Details:

Filename c:\Program Files\Microsoft\Exchange Server\v14\ClientAccess\Owa\web.config
Line Number : 37
Error: Configuration section not allowed to be set below application.

Line 37 reads <authentication mode="Windows" />

I Googled as usual and found an article (Not Microsoft) that say to delete this line which I did. Error went away. Question I have is why should I have to delete it to begin with. This Exchange install is about 3 months old. By deleting this line, what else will break. I am sure its there for a reason. I really don't even understand that error. Can someone elaborate please?
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Question by:shadowtuck
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Amit earned 400 total points
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I even faced same issue. Seems to be authentication issue. Though, i didn't saw any MS KB which explains the reason.
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by:shadowtuck
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Seems to me messing with the web.config file is probably not good. I made a backup of course before doing anything but I am not sure why I had to delete that line. Perhaps those virtual directories do not get used anymore. I verified the Exchange and ExchWeb do not but not sure about the Public virtual directory. All the others seem fine. Basically the ones used by Exchange 2010. I wonder if this is just normal behavior when you try to examine Authentication of those directories.
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by:shadowtuck
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Seems to be a generic error that most people are getting. Since the VDirs it complains about are not used anymore in Exchange 2010, I just chose to ignore it.
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