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How do I filter the Error Log (Windows Server 2008) for errors from one particular website hosted on the server? The site is using a unique Application Pool, and runs under the context of the application pool user, so I could use that instead.

I was told by a client that there was an error, but he can't give me an approximate time, and there's too many other warnings listed to search through them one by one.

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Search for the client IP in the IIS log, and identify the request by HTTP return code and or URI stem. There you'll have an exact timestamp (by default, UTC+00)

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Sorry, when I say, "I was told by a client", I'm referring to a person, not an application. :) Nobody knows the IP of the site visitor. – David Feb 1 '12 at 17:56
"Nobody knows the IP of the site visitor" - Have the person determine his IP address, just search "What Is My IP Address?" in google – Mathias R. Jessen Feb 1 '12 at 18:01
IP address is not available. Is there any other way? The visitor was my client's customer who told him, and I don't want to make them go through the hassle. Basically, I just want to know if there's a way knowing nothing but IIS info about the site (URL, application pool, etc). – David Feb 1 '12 at 23:07

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