You can create a password to restrict access to accounts, sub accounts and sub sub accounts. If an account is password-protected, you must type the password to edit or process mail against the account. Passwords are case sensitive, can be alphanumeric and must be four characters in length.
Note: Remember to share the password with the people who run the mail against this account.
Follow these steps to protect an account with a password.
In the Edit or Add Account window:
Tip: Passwords are masked. To see the password text, click the lock icon next to the field.
UPDATED: November 12, 2020