http://blogs.msdn.com/dynamicscrmonline/archive/2009/06/26/business-data-auditing-accelerator-for-microsoft-dynamics-crm-online.aspxThe Business Data Auditing Accelerator provides basic audit capabilities for organizations using Microsoft Dynamics CRM. The accelerator takes a snapshot of a record whenever the relevant event occurs within the system such as Create, Update, Assign anden-USCommunityServer 2.1 SP1 (Build: 61025.2)