About temporary passwords in Apple Business Manager
Apple Business Manager creates temporary passwords which are valid for 90 days. These temporary passwords are for users of the accounts to sign in with their Managed Apple ID, at which point they must change their password. Apple Business Manager never shows the password of an account after it has been changed from the temporary password.
For all Apple Business Manager roles, sign-in always requires that person’s Managed Apple ID password and a six-digit verification code.
Important: Apple devices whose information is uploaded to Apple Business Manager handle authentication differently than devices that aren’t listed.