CRM 2011 Dynamics Customers testing and deploying update Rollup 14, have noticed that performance issues resolved in Outlook Client have returned. The registry key for Disable Mapi Caching appears to be no longer be working (reintroduces poor outlook client performance).
Microsoft Support has confirmed that the setting has now been moved to the OrgDbOrgSetting as follows:
It’s recommended to keep your older registry key in place as well to avoid any further issues should a future update switch back to the registry key method.
For information on the OrgDbOrgSetting Tool for Microsoft Dynamics CRM 2011
For more details on the disable Mapi caching for CRM 2011 Outlook client, please review the Microsoft KBs: