Ever since I upgraded to Mountain Lion my Outlook client’s performance absolutely sucked!. I was surprised that Microsoft did not have a solution for this nor could I find any resolution from Apple. I eventually came across this solution -> https://discussions.apple.com/thread/4149013?start=0&tstart=0
I thought I would rewrite the instructions to make it easier for people.
The problem is identified as a botched update which leaves multiple preference settings which are seen by outlook as being multiple identities.
- Click on Finder
- You need to deleted the “Office 2011” folder ...