Yes, you'll have to reset your password when you claim your HarvardKey. But once you set your new HarvardKey password, you will no longer be subject to the annual change requrement. (Please remember, however, that it's important to change your password if you ever feel that your account may have been compromised or your password exposed to others — even unintentionally.)
After you change your password, you'll want to make sure that you update that password anywhere that it might be stored, such as in your email preferences or apps on your phone or tablet — particularly since...
Read more about I just did my annual password reset. Do I have to do it again when I claim my HarvardKey?