When a user migrates to Access Identity, they should receive a verification code to the email address they entered.
Users can use any email address for Access Identity, as long as it isn't already in use. However, they need to ensure they have access to the email address so that they can receive and action the verification code.
Verification codes don't automatically trigger when a user restarts the migration flow. If they need a new code, they need to click Resend Code.
If the user can't remember which email address they used, or would like to use a different email address, they can click Use a different email address.