The background was that I used school email to register Adobe account, but opt for service myself, so there is a personal account and an enterprise account assoicated to my account.
When I try to manage my personal account, there is identity verify prompt: "For your protection, please verify your identity."
-> I choose "Continue with Google"
-> Jumps to "Choose an account for", I choose "Personal account"
-> After Google login validation, it jumps back to the first page "For your protection, please verify your identity" "Continue with Google"
This is an infinite loop, and happens when I try to login from different device. Even if I try to add different identity verification methods, I must verify my identity first and come back to this log in loop.
p.p.s. you can also use twitter to tweet @AdobeCare
p.p.p.s. if you're contacted by anyone (via email or private message), it's much more likely to be a scammer than an adobe representative. ie, double check for an employee badge if contacted in the forums and look for an adobe.com domain in the email address if you click reply to an email. then check again and be very suspicious. any other method of contacting (or offering to contact you) is almost certainly a scam, https://community.adobe.com/t5/using-the-community-discussions/staying-safe-in-the-adobe-support-com...