There are two types of synchronization with Microsoft Dynamics CRM for Outlook:
When you choose to go offline, Microsoft Dynamics CRM copies data from the Microsoft Dynamics CRM server to your computer. The amount of data copied locally to your computer is defined by a filter and by the synchronization options set in your personal options.
After you return online, changes you made to local data are updated on the Microsoft Dynamics CRM server. If you encounter problems during synchronization, you are given choices about how to continue. Microsoft Dynamics CRM notifies you of any duplicate records.
Set synchronization options in Microsoft Dynamics CRM for Outlook
Set address book options in Microsoft Dynamics CRM for Outlook
Synchronize with Outlook manually
Choose the types of Microsoft Dynamics CRM records and other items that synchronize with Outlook
Work with Data to Take Offline