Service Unavailable: HTTP Error 503. The service is unavailable in SharePoint

Service Unavailable: HTTP Error 503. The service is unavailable error normally occurs whenever the password for the application pool identity account is changed or application pools are in the stopped state. This error may appear temporarily when you deploy solutions. In my case, I realized that password got changed for the Identity account.

Its a best practice to set “Password never expire” option for service accounts, BTW!

Here are the steps to resolve:

SharePoint Error: Service Unavailable: HTTP Error 503. The service is unavailable in SharePoint

If you are running SharePoint in Windows 2003:

  • Go to Start >> All Programs >> Administrative Tools >> Internet Information Services (IIS) Manager.
  • Locate your App Pool account and right-click on it and select “Advanced Settings”.
  • Go to process model then Identity Click on the Identity >> Set and then give the user name, password and confirm password.

Hope this will work fine after that.

Here is the Microsoft KEDB: http://support.microsoft.com/kb/823552

If you are running SharePoint in Windows 2008 or Later:

  • Go to IIS Manager (Start > Administrative Tools > Internet Information Services Manager)
  • Expand the server node, and click on Application Pools
  • Locate the Application Pool of the SharePoint site, If it is stopped – Start it. If the password is changed, update the password:
    • Click on “Advanced Settings” Setting Application Pool Identity in IIS
    • and then click on … Button in Identity property
      Set Application Pool Identity in IIS
    • Enter the User Name and password for the Application Pool account.
      Set Application Pool Account User Name password in IIS 

It could happen when the App pool’s Advanced Property: Enable 32-Bit Applications is set to “True”! It should be false.

Tail: Application Pool Starting and Stopping? or Application Pools stops after restart? Make sure your application pool account has “Log on as batch job” rights!. This error may occur when necessary services like the World Wide Web Publishing service, SharePoint Timer Service is in the stopped state.

Salaudeen Rajack

Salaudeen Rajack is a SharePoint Architect with Two decades of SharePoint Experience. He loves sharing his knowledge and experiences with the SharePoint community, through his real-world articles!

24 thoughts on “Service Unavailable: HTTP Error 503. The service is unavailable in SharePoint

  • Thank u so much…it was helpful and time saving solution.

    Reply
  • thanks, this is helpful for me.

    Reply
  • Thanks , It worked fine for me

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  • Enable 32-Bit Applications is set to “True” – Perfect, that’s what was wrong!

    Reply
  • I was facing the same problem.After setting new credential,Need to set Enable 32-Bit Applications is set to “True”! It should be false.

    It works fine for me!!!

    Reply
  • Still I’m facing the problem. .Any one can you help me for that?

    Reply
  • It does not work for me. App pool is started and also I have changed the password for the identity account. Still it does not work and is giving me nightmares… please help

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  • it worked awesomely for me… I had just patched the server and changed the service account defaults passwords but was not sure if the patches broke it or the passwords change and then still had to figure out which of the accounts was responsible. thanks a million

    Reply
  • Thanks! Win 2008 Solution worked on my Win2012 HyperV VM.

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  • above is solution…how we can find root cause?

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  • Thanks , it solves the problem with sharepoint 2013 on win server 2012.

    Reply
  • Perfect!!! In my case… domain/administrator – than password twice…

    Thanks!!!

    Reply
  • Hi

    Thanks this was extremely helpful. We were under pressure since the entire organisation was offline and needed this up asap.

    Thannks once again for this excellent info.

    Keep up the good work.

    Reply
  • Thank you sooo much..It helped me a lot.. 🙂

    Reply
  • Thank you very much. It is awesome. I relieved from all the troubles.
    Thank you so much again.

    Tesfaye

    Reply
  • Thanks! I found all my application pools were just stopped!

    Reply
  • Every time I deploy a solution this happens and it gets annoying. Is there a way to make a custom page instead of this ugly black and white one with no info?

    Reply
    • You can create a custom error page for 503 error, as in: https://www.sharepointdiary.com/2012/06/custom-404-page-not-found-error-page-in.html. just cgange the error code!

      Reply
  • Great!! Thanks a lot

    Reply
  • This worked! Thanks!

    Reply
  • Perfect!! Great suggestion! You saved my bacon.

    Reply

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