Outlook 2011 was for a MAC, do you mean Outlook 2010?
I found this online, it may help:
Turn Windows Indexing Service back on.
1. Control Panel >> Programs >> Programs and Features >> Turn Windows Features on or off
2. Tick (check mark) the Indexing Service check box and hit OK
Thats it. You may want to restart your computer just for good measure. Once you are back up, you will need to wait for a while for the indexing service to Index everything (many hours), but after a short time (half hour) you can check your email search bar and find that some of your email is now showing in the search results.
I have a Mac, so I was referring to Outlook 2011. It turned out that you were right, though. Spotlight was indexing my computer, which was the reason I couldn't search! As soon as Spotlight finished, searches worked just fine.
Well glad I sort of hit the nail on the head, so to speak....LOL
That reminds me - we need to activate the MAC section of these forums. It's there but locked and hidden at the moment, awaiting some manager's OK I believe. I'll ask about it once more.