When you use Microsoft Office Communicator 2007 on the same computer as Office 2003 or Office 2007, you may experience intermittent failures when performing Messaging API (MAPI) tasks

When you use Microsoft Office Communicator 2007 on the same computer as Microsoft Office 2003 or the 2007 Microsoft Office system, you may experience intermittent failures when performing Messaging API (MAPI) tasks. For example, sending mail programmatically may occasionally fail.

To resolve this issue, install the hotfix package described in Microsoft Knowledge Base article 961552. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.