How do I change my default email address in my user account as an instructor?
Your default email address is used as your main contact method in Canvas and is added when creating your Canvas account. Email addresses are used to create Canvas notifications; they are not used as a contact method for other Canvas users.
If you add another email address as a contact method, you can change your default email address in Canvas.
Open User Settings

In Global Navigation, click the Account link [1], then click the Settings link [2].