Error message 401.2.: Unauthorized: Logon failed due to server configuration. When application deployed

Question

I have an asp.net 4.0 application that works fine running under cassini but when i deploy to IIS i get the above error. It is running under the Default App pool which a numb

Answer 1

I had the same problem just now. None of the fixes I found worked, so I'll just post here in case it helps someone.

For me the issue was solved this way:

• Open IIS manager
• Select "Application Pools"
• Right click on the application pool you are using and select "Advanced settings"
• Set "Enable 32-Bit Applications" to "True"
• Click "OK" to close the dialog box
• Right click on the application pool again and select "Recycle"

Hope that will help someone else out! This was driving me crazy.