Which action should be prioritized to limit access to confidential data when an employee leaves?

The action of immediately revoking system access is a critical step in ensuring the security of confidential data when an employee leaves. This immediate revocation helps to prevent unauthorized access to sensitive information that the employee may have had while employed. By cutting off access right away, organizations can reduce the risk of data breaches and protect both the company's information and its clients.

When an employee departs, there is often a window of time when they still have access to systems and data. If this access is not revoked promptly, there is a potential threat that the former employee could misuse their access, whether intentionally or accidentally. Immediate action reflects a proactive approach to data security, ensuring that any privileges associated with that employee are swiftly terminated to safeguard the organization's information assets.