Manage security

The AVEVA Historian uses two security mechanisms:

• Windows operating system security

• Microsoft SQL Server security

  Important: SQL Server authentication is provided for backward compatibility only. For improved security, we recommend that you use Windows authentication.
  
  Note: During configuration, if you are upgrading from an earlier release, Historian requires that you change the passwords for any legacy default SQL logins, such as wwUser. When this is required, it is clearly indicated during configuration of security options.