I am getting the spinning multicolor wheel periodically in Outlook 2011 since upgrading to Mavericks. I get a 5-second pause about once or twice a minute. There does not seem to be any specific action that causes it. 
-Outlook version 14.3.8
-Account is Exchange. No other mail accounts are connected.
-MacBook Pro 16gb memory, i7 intel

So far I have:
  • Re-indexed the data storage file
  • Removed large amounts of email. Trash, Deleted Items, Junk mail. Archived old emails.
  • Tried using a different user profile
  • Removed and added the exchange account
  • Totally removed office 2011 and all related files and re-installed it.
Any ideas to resolved this issue?