I can't send calendar invites or meeting responses from my Exchange account in Entourage

Cause: This is a known issue with Office 2008 for Mac 12.1.3 Update. The issue occurs only when an Entourage identity is configured with more than one e-mail account, such as POP or IMAP, in conjunction with the Exchange account.

Solution: Download the Microsoft Office 2008 for Mac 12.1.4 Update from Microsoft Office 2008 for Mac 12.1.4 Update on the Microsoft Web site.

The Microsoft Office 2008 for Mac 12.1.4 Update fixes the calendar issue in versions of Microsoft Entourage that were updated with the Microsoft Office 2008 for Mac 12.1.3 Update.