You experience performance issues when you run Microsoft Office Communicator 2007 or Microsoft Office Communicator 2007 R2 on a computer on which Microsoft Office Outlook 2003 is installed. For example, the program may stop responding (hang) or crash.
This issue may occur because of compatibility issues between Communicator and Outlook.
Install the latest service pack for Microsoft Office 2003. For more information about how to obtain the latest service pack for Office 2003, click the following article number to view the article in the Microsoft Knowledge Base:
870924 How to obtain the latest service pack for Office 2003After you install the Office 2003 service pack, visit the following Microsoft Update website and install any other additional Microsoft updates that are available: