Exchange 2013 customers can reset password from Outlook Web App.  Alternately, administrators for SharePoint or Exchange 2013 services can reset the password by following these steps.

1. Login into Control Panel at

2. Click on Hosted Organizations.

3. Click on Organization Name.

4. Click on Users.

5. Click on user for whom you want to reset the password.

6. Enter the new password.

Minimum Criteria for Password:
 Passwords cannot contain the user’s account name or parts of the user’s full name that exceed two consecutive characters.
 Passwords must be at least 8 characters in length.
 Passwords must contain characters from at least three of the following four categories:
i. English uppercase alphabet characters (A–Z)
ii. English lowercase alphabet characters (a–z)
iii. Base 10 digits (0–9)-Atleast 2 numbers.
Non-alphanumeric characters (for example, !$#,%)