[Exchange] History of who accessed a mailbox?

[Heaton, Joseph@Wildlife]

Is it possible to get a running history of people that have logged into a 
mailbox?

Exch 2010 SP2 ur5v2

Joe Heaton
Enterprise Server Support
CA Department of Fish and Wildlife
1807 13th Street, Suite 201
Sacramento, CA  95811
Desk:  (916) 323-1284