Supplemental accounts are for computer login and dept file access only. Email is no longer attached to these types of accounts.
How to change the owner of a supplemental account
How to reset your supplemental account password
How to verify your supplemental account and extend it out another year so it does not expire.
How to change the password for supplemental accounts
How to create a new supplemental account
How to modify supplemental account display name
Having issues resetting your supplemental account password?