Microsoft released recently the technical document Outlook Synchronization in Microsoft Dynamics CRM 4.0.
Brief Description
This document describes the client synchronization process that is associated with Update Rollup 7 for Microsoft Dynamics CRM 4.0 or later (for on-premise deployments) and with Microsoft Dynamics CRM Online November 2009 Service Update or later (for online deployments).
Overview
Both the online and offline versions of the CRM Outlook Client support synchronizing CRM contacts and CRM activities to Outlook folders, or Outlook synchronization. Outlook synchronization enables Outlook users to view Dynamics CRM information, including contacts, tasks, phone calls, letters, faxes, appointments, and e-mails, within the Outlook interface. This document describes the client synchronization process that is associated with Update Rollup 7 for Microsoft Dynamics CRM 4.0 or later (for on-premise deployments) and with Microsoft Dynamics CRM Online November 2009 Service Update or later (for online deployments).