During installation of the Application Server you will need to specify three user accounts with passwords:
Service user: The user running the Application Server Windows Service. This is either a local Windows user or a Windows Domain user.
Accessing user: The user that is used by the Application Server to access the Application Server Database. This can be a SQL Server user using SQL authentication or a Windows (Domain) user with Windows authentication. By default this user is created during the installation of the Application Server Database.
Manager user: The first Redbex user created by the Setup to allow initial access to the Application Server.
All these user accounts need a password. We strongly recommend to choose strong passwords for all these accounts. Also we recommend to not use the same passwords since this might temper your overall system security.