Ok, Outlook.com & hotmail are one in the same. MS wants users to go to outlook.com but I still log into mine as hotmail. You might try this link http://windows.microsoft.com/en-us/windows/outlook-helpNo its not a web based email.
What I wanted was to search an email. Can't remember the subject of the email so I search by the name of the sender. No results found.
Then I rebuild my Index. The rebuild completed after 3 days straight and did a search again but unable to find it under any of my folders in Outlook 2010.
...so ya that's all.