Hi @admin85
Thank you for reaching out to us!
Once the email address of an Auth0 user is changed, the new address replaces the old one from that point onward and the user is no longer able to use their old email address to access the account.
Depending on the integration for email change, it could lead to user account lockouts. The safest way to handle such cases is outlined in our documentation to Update Dashboard User Email Addresses, which in summary requires the creation of a new user account with the correct email address and deleting the old account once the user accesses the new one.
I warmly recommend checking out the following topic Change user email , as the steps outlined by my colleague should provide a robust outline of the process, even as the post is little old at this point.
Hope this helped and please reach out to us for any other issues or requests!
Have a great weekend ahead!
Gerald