Accessing Microsoft Teams using organizational or personal credentials
Hello Alrick,
May I confirm with you whether your account is managed by school? And MFA is asked when sign in other Office 365 service like Outlook Web App or so? Are you able to sign in other services?
From the screenshot, it seems that you only have 2 verification options for MFA. If your account is school account, please sign in Office portal with your account ->click your photo and select “My Account” -> Security & privacy ->Additional security verification -> Update your phone numbers used for account security -> set your authentication phone here to receive code and check if it works:
If you didn’t find this option, I recommend you contact admin, let him enable other verification options. Generally, there’re 4 options:
Besides, I noticed you mentioned even disable MFA, you still couldn’t sign in Teams? If so, are you still able to recall any error message it prompted?
Kind Regards,
Anna