Managing personal Outlook.com account settings, security, and privacy
Dear @Cresse, Jim
If you're using an Outlook.com, Hotmail, Live or MSN account, your Outlook password is the same as your Microsoft account password. To change it, go to your Microsoft account and select Security --› Change password. Enter your current password, choose a new one, and save the changes.
https://account.microsoft.com/security
If this is a work or school account, the process is different. You can normally change the password from My Account --› Change Password, although your organization's policies may affect this.