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I have a web application hosted on IIS with a separate AppPool. Without any changes, we are getting a 403 error and this error gets resolved on IIS reset. We have few entity information like user details are stored in an in-memory cache.

Can you help me to understand why this is happening.

Rahul S
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  • According to your description, we are not sure what caused this problem, can you view the log records in IIS? – Ding Peng Dec 15 '20 at 07:24
  • Let FRT reveal the source of those 403 errors, https://learn.microsoft.com/en-us/iis/troubleshoot/using-failed-request-tracing/troubleshooting-failed-requests-using-tracing-in-iis and then it should be easy to know what's wrong and why IIS reset helps. – Lex Li Dec 15 '20 at 07:29

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