app pool not starting Exchange 2010

I am having an issue where my OWA is not connecting unless I restart the IIS every so often, and the "msexchangeautodiscoverappPool will not start and when I try I get the attached error. I also noticed the errors in event viewer are 5189 and 5203 both pertaining to the app pool. Any assistance would be greatly appreciated.
reindeerautoAsked:
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Dan McFaddenSystems EngineerCommented:
You forgot the attachment...

Dan
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reindeerautoAuthor Commented:
Sorry about that
Capture.PNG
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Dan McFaddenSystems EngineerCommented:
I would verify the permissions on the applicationHost.config file.

The permissions should be:

Owner: SYSTEM
Allow TrustedInstaller Full control
Allow SYSTEM Full control
Allow Administrators (YourServer\Administrators) Full control
Allow --- probably your account too.  Full

These permissions are normally inherited from the C:\windows\system32\inetsrv\config directory

Dan
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reindeerautoAuthor Commented:
Could this all be because of file system structure being corrupt or unusable on a virtual disk? The permissions are good, this server has been running for years and boom all of a sudden nothing.
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Dan McFaddenSystems EngineerCommented:
Its possible that file system corruption could cause issues.  I'm not sure if a physical or virtual disk makes a difference... I would probably say it wouldn't make a difference.

You could run a chkdsk without the fix switch, just to see if it reports problems.

Dan
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Dan McFaddenSystems EngineerCommented:
Just a shot in the dark... is the applicationHost.config file marked as Read-Only?  Check the properties of the file and look at the attributes.

Dan
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reindeerautoAuthor Commented:
No the applicationhost.config is NOT marked as read only
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reindeerautoAuthor Commented:
The app pools all seem to be started, but the Microsoft transport service will not start and I have an error in event viewer saying file system structure on dis is corrupt and unusable. Could this be the cause of all these problems?
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Dan McFaddenSystems EngineerCommented:
I believe it could be at the least part of the issue.

You'll probably need to run a Resource Checker scan.... the "sfc" utility to verify the OS files.

From an Administrator command prompt
sfc /scannow

Open in new window


Then a chkdsk as well.

Dan
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reindeerautoAuthor Commented:
Got transport service on, now says databases are corrupt and they will not mount.
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Dan McFaddenSystems EngineerCommented:
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reindeerautoAuthor Commented:
Thank you for your help, repairing the databases fixed the issue.
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Microsoft IIS Web Server

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