You may be able to change your password in your profile settings.
If you do not have access to change your password, your password is controlled through your institution. Contact your institution to learn how to change your password.
If you can change your password, there are no password reset intervals, so you can change your password as little or as often as you want. However, you can keep strong passwords effective by changing them often. Here are some good password guidelines:
Use at least eight characters (the more the better), but most people will find anything more than about 15 characters difficult to remember.
Use a random mixture of characters, upper and lower case, numbers, punctuation, spaces and symbols.
Don't use a word found in a dictionary, English or foreign.
Note: If you forget your password, you may be able to reset it. Learn how to reset your password.
Open User Settings
In Global Navigation, click the Account link , then click the Settings link .
Click the Edit Settings button.
Click the Change Password checkbox to create a new password. Type your old password in the Old Password field . Type your new password in the New Password field . Type your new password again in the Confirm Password field .
Note: If you do not have access to change your password, please contact your institution. Your institution will tell you how to change your password.