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Total Views : 586 resolving the error The service is unavailable when placed app_offline page

When your website is under maintenance then you can place the app_offline.htm page in the root folder so that any user access the website(any page) they will get the app_offline.htm page.
When you have custom redirects for httpErrors in your website, you may get the message "The service is unavailable" message when you place the app_offline.htm page in your website. To resolve this issue just add the below configuration in your web.config file under httpErrors section.


<httpErrors errorMode="Custom" existingResponse="Replace">
  <error statusCode="503" path="App_Offline.htm" responseMode="File" />