The Microsoft SQL hardening guide provides a comprehensive set of guidelines to help secure SQL servers. These guidelines cover a range of areas, including server configuration, authentication and authorization, network security, and data protection. By following these guidelines, you can reduce the risk of unauthorized access, data breaches, and other security threats.

Here are some recommendations from the Microsoft SQL hardening guide that you should consider when securing your Trend Micro Apex One and Trend Micro Apex Central database servers:

• Use strong passwords: Ensure that all user accounts have strong, complex passwords that are changed regularly.
• Limit access: Only grant access to users who need it, and ensure that permissions are set appropriately based on their role.
• Enable encryption: Use encryption to protect sensitive data both in transit and at rest.
• Use firewalls: Configure firewalls to restrict access to SQL servers from unauthorized sources.
• Regularly patch and update: Keep your SQL server software up to date with the latest security patches and updates.

It is also recommended to regularly review and update your security measures to ensure that you are staying ahead of potential threats.