If you haven't seen it already, sometime in the next few days you'll get a software update for Microsoft Office for Mac 2008 and 2011.
The update has security patches that Microsoft deems 'critical' and improvements to Outlook. The update requires a Mac running OS X 10.5.8 or later. Some Macs will need multiple updates because this is not a single patch.
Here are the details of the updates:
This update fixes an issue in which automatic configuration did not work correctly for Outlook.com accounts.
This update addresses an issue when importing data from a PST file. If an email message in the PST file contains inline images followed by attachments (in that order), the attachments will be missing from the message after it is imported in Outlook for Mac.
This update