The Class of 2016 is the first class in which students may retain their email address and Outlook account after graduation. HBS email address and password do not change upon graduation. You will continue to use the HBS email address as your HBS Username to log into the HBS Alumni Website.
In the past, alumni were issued a LEFA, Lifelong E-mail Forwarding Address, which had a similar pattern as the student account. The LEFA acts as a forwarding address and login account for alumni who graduated prior to May 2016.
On the Alumni Website any references to LEFA login should be considered synonymous with HBS login.