Please help,

I have a large collection of emails which contain teaching worksheets but since moving to 'Outlook.com' from Hotmail, the search never returns any results even when I specify a folder and knowing full well that there are emails with that title in that location. 

Having read other posts from people who have the same issues I have tried to follow the advice given to them but have failed to solve the problem.

So far...

I have cleared the cache

Tested account on Google Chrome and Explorer

Tried different laptops and Ipad

Deleted over 4000 emails (and still tidying folders).

I think I may need the account 're-indexed' but I can't check if the account is 'indexed' as the web version doesn't have a 'file' option to select.

I'm all out of ideas now and is hoping someone can help as this account is becoming useless to me without the valuable 'search' option.