A:  Accounts for individuals who are no longer eligible will be notified and then deactivated automatically. Notification of a pending deactivation will be emailed at least 14 days before the account is deactivated. Information and instructions on what the individual should do to prepare for the deactivation are included in this notification.

Exactly how long your account is retained depends on your status (student, staff or faculty) and is discussed here http://www.yale.edu/email/central/acctdeactivate.html.