Update SharePoint 2010 Farm Credentials Tips
Within your SharePoint environment – such as your PowerPivot for SharePoint single server install – a common task that you will need to do is to update the SharePoint Farm credentials when the password changes. You may be able to do this automatically by using the new SharePoint 2010 feature to plan automatic password change.
But if you need to change your farm credentials, you can follow the instructions: How to change service accounts and service account passwords in SharePoint Server 2007 and in Windows SharePoint Services 3.0.
Tags: setup, sharepoint, troubleshoot