Microsoft Outlook 2011 for Mac (and previous versions) likes to put all the data in your Documents folder:
~/Documents/Microsoft User Data
This is really annoying if you want to do a search for a document within your Documents folder without having to sort through a lot of irrelevant results. But there is a simple fix!!!
The “Microsoft User Data” folder can be moved to another location and work perfectly fine.
Warning: You should shutdown Outlook 2011 and all other Microsoft Office applications prior to making a change like this. In addition backup up your machine using Time Machine or what ever app you prefer. Please wait until it is done. Once you feel confident that you have a clean backup then move forward.
Open up a Terminal. [Press (CommandKey) + (SpaceBar), then type: “terminal”]
My-Mac:~ username$ cd ~/Documents
My-Mac:~ username$ mv “Microsoft User Data” ~/Library/Preferences/
And you are done! Start up Outlook and you should be good to go.