The Outlook Client for CRM is one of the most intriguing features in the Microsoft Dynamics CRM 4.0. Rather than having users ‘go somewhere else’ to use CRM, the Outlook CRM client provides in integration to Outlook — allowing end users easy access to CRM from where they do most of their day to day work.
Due to the sheer number of components the Outlook CRM client leverages, troubleshooting problems related to it could best be described as an adventure.
A great article is posted at the CRM Team Blog recently about how to troubleshoot and isolate common Outlook CRM Client issues. this could be of great help for those experiencing issues. Don’t forget to run that Diagnostic Tool first.
go through it here :