One of the first items on installation or assuming management of an Avaya IP Office phone system is to change the default password of the Administrator's account. There are other built-in system users that Avaya has built-in, for instance Manager and Operator, as well as others, and the following step by step guide is to reset all of these built-in accounts to the defaults. Good practice always requires a change from any default passwords to prevent access from unauthorized users entering your phone system and making changes, or worse yet, to make unauthorized calls that can accumulate lots of charges very quickly. Unauthorized calls that occur usually involve international calls, so the expense can be significant.
Username - Password