I am getting 'HTTP Error 503. The service is unavailable.' What should I do?

Cause : This error is encountered when application pool of website is stopped or queue request is full of application pool.

Resolution :

  • Log into your server via remote desktop.
  • Click on Start – Run – Type  inetmgr – Press enter key.
  • Expand IIS – click on application pools  – Start application pool if it shows stopped.
  • Or right click on application pool and click on recycle.

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