I am using Office:mac 2011, just after I updated to the new operating system OS X Yosemite version 10.10, my Outlook account has started to add mailboxes to some of my email accounts. e.g.. INBOX 1-INBOX 11-INBOX 111 and it just keeps going adding more ones after each inbox. It has moved accounts, with names in grey, and some emails are just not there anymore. Is it an incompatibility problem with the new operating system?