for the change of the 2FA, you will have to open a ticket through this form: https://www.paloaltonetworks.com/services/support/login-assistance
Hi @qmso475 ,
In addition to @PavelK anwser you can also check the following link, which give some information how to change your MFA yourself.
Unfortunately to access the setup portal you need to have access to your account, so you need to ask support team to remove the email 2FA so you can access your account, BUT second factor is now mandatory so you will be prompted to setup one. I would recommend you to use "Google Authenticator", it doesn't have to be exactly Google, Microsoft Authenticator works fine as well.
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