Webplease use the online steps below to update your email address, phone number, or mailing address. These cannot be updated in the marriott bonvoy® mobile app. Webin an continuing effort to safeguard your account, you are required to change your password. You will not be able to sign into your account until you change your. Webforgot your marriott bonvoy username or password? Please enter your member number or the email address linked with your account profile. Email or member number multiple accounts? Use your member number to reset your password…