Hi All,
Here is current progress:
==========================================================================
Microsoft is continuing to work towards resolving an issue in which some customers using Mac Outlook or Entourage may be unable to send messages exceeding a size of 6 megabytes. An update to the latest build is being performed to remediate impact. Engineers have completed the deployment for over 90% of customers and expect to finish all deployment within the next 12-17 hours. The next update will be provided by December 11, 2013 at 6:00 PM UTC, or upon service restoration.
==============================================================================
Thanks,
Johnny Zhang