Thursday, 23 June 2011

SharePoint 2010 - HTTP Error 503. The service is unavailable

If you encounter this error message in your SharePoint environment the first place to look is the logs, but there's a very good chance that this relates to a password problem for one or more accounts running one SharePoint's IIS application pools.

Check IIS > App Pools and identify the accounts used by your app pools.

Application_Pools

Open AD and ensure that these  service accounts are configured so that the password never expires and the user cannot change the password.

AD_Admin_Account_Options

Reset the password(s) as required.

Return to IIS > App Pools and right click each SharePoint related one and select 'Advanced Settings' 

Application_Pools_IIS

In Process Model > Identity, click on the ellipses

Application_Pool_Identity

Click Set

Application_Pool_Identity_Set

Type in credentials and OK

Application_Pool_Identity_Set1

IISRESET

You may also need to manually restart the Application Pools affected by the change.

3 comments:

  1. Other than Password expiry and Application Pool in Stopped status, There are few more reasons for Service Unavailable: HTTP Error 503. The service is unavailable in SharePoint

    Found this checklist to resolve this error in SharePointDiary.com -

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

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