In Exchange 2013, resetting the password for users can be difficult. It might be missing or you may not see the option when you click on a USERNAME.
Luckily, this isn't difficult to overcome. I found the steps here:
http://www.mustbegeek.com/reset-user-password-in-exchange-2013/
- -click PERMISSIONS (on the left-hand side).
- -click ADMIN-ROLES (at the top).
- -double-click ORGANIZATIONAL MANAGEMENT (in the middle).
- -find the ROLES section.
- -click the + (plus-symbol).
- -find RESET PASSWORD (in the list).
- -click ADD (at the bottom).
- -click OK > SAVE.
- -logout of EAC.
- -login to EAC.
This should enable you to change the passwords within EXCHANGE EAC.