Microsoft Identity Manager is not released yet but in CTP2 a new feature is added to mitigate the problem that after a user is changing his/her password there are these days plenty of devices and RDP sessions still using the old password and the user account is locked within a few minutes.
Until now the user had to call the helpdesk fur account unlocking or wait the grace period for automated unlock.
With MIM a self-service account unlock feature is added to the password reset page. So a user can unlock his/her account and keep the existing password. E.g. then he/she can log in to the RDP session and close it or update the password on the smartphone.
SSAU can be integrated with Azure Multi-Factor-Authentication (MFA, previously PhoneFactor)
See also: http://blogs.technet.com/b/ad/archive/2015/03/03/microsoft-identity-manager-public-preview-2-is-available.aspx