For the last week or so, Outlook 2011 has had errors in searching mail. I have made a couple of screen grabs below to better show what has happened:

In this shot you can see that there are multiple instances of the word Endeavour, both in the email subject line, and in the Sender Name. When I run a search for "Endeavour" though, I get these results:

As I use Office 2011 for work, and receive usually an average of 100+ emails per day, having the search facility work is absolutely essential when going back to check an item.

Unfortunately this has just stopped for no apparent reason. I have rebuilt the database with no change to the search results, and am now at a loss for was to do. As the search is so important to my work, I am now having to consider using a different email client, though as I like all other aspects of Outlook, only want to do this as a last resort.

Can anyone tell me what needs to be done to rectify this issue?

I am using a Macbook Pro:

  Model Name: MacBook Pro

  Model Identifier: MacBookPro11,3

  Processor Name: Intel Core i7

  Processor Speed: 2.6 GHz

  Memory:         16 GB

  System Version: OS X 10.10.3 (14D131)