I am using Office for Mac 2011, version 14.4.6, on a MacBook Pro running OS X v 10.9 Mavericks, and I'm using Outlook to access my gmail account.

Recently messages in Outlook have been changing from 'read' to 'unread' after they have been marked 'read' and moved to the trash. When I sign into my gmail account, they are marked as 'read'.

How can I fix this?

Thanks