To Reset Microsoft Exchange password, follow these instructions:

Press [CTRL], [ALT] and [DELETE] at the same time.
In the window that appears, click the Change Password button
Enter a username
Select the domain for which the password is changed
Enter the old password
Enter the new password
Re-enter the new password
Click the OK button
A box will appear saying "Your password has changed".

Changing the Microsoft Exchange password will only change the password on the mail server. It will not change the password of the mail client program. To receive e-mail, the passwords for the mail server and the mail client must match.