Managing Database Mirroring (SQL Server Management Studio)
Microsoft SQL Server Management Studio provides a Mirroring properties page for database mirroring and a wizard for configuring database mirroring security. The Configure Database Mirroring Security Wizard works in conjunction with the Database Properties Mirroring page, from which the wizard is launched. Using the wizard, you can set up or change security settings at some or all server instances for a new or existing mirroring session.
SQL Server Management Studio References
To use the Mirroring page to configure a database mirroring session
To launch the Configuring Database Mirroring Security Wizard