Configure my outlook on my iPhone

In my work place we use an exchange server for outlook. Currently I am on leave and I am looking for a way to configure my work Outlook account with my IPhone such that I can use Outlook email with the calendar and tasks features and also my yahoo account. I have searched for a solution online but all the results I found don’t seem to help. Can you please tell me if this is possible and if possible how is it done?
