After changing to au ID+_ (half-width underscore) + Date of cancellation/transfer/inheritance (YYYYMMDD), log in with au ID+_ (half-width underscore) + Date of cancellation/transfer/inheritance (YYYYMMDD) and same password as before. At that time, you will proceed to change the au ID to an email type.
Once you have changed your au ID to an email address type, use the email address au ID and the same password as before for subsequent logins.
For the procedure to change to an email address type au ID, please see below.