The best recommendation to prevent unauthorized access in this scenario is to implement multi-factor authentication (MFA). According to the ISACA CISA Study Manual, "MFA is a security technique that requires two or more independent credentials for user authentication. MFA can be used to provide additional security for cloud-based services and applications." Thus, implementing MFA would be an effective way to prevent unauthorized access and maintain a secure environment.
Multi-factor authentication (MFA) is a security measure that requires users to provide two or more pieces of evidence to verify their identity before accessing cloud-based applications and data123. MFA can prevent unauthorized access by making it harder for attackers to compromise user credentials or bypass password protection