Here,s why the other options are not ideal:
A). Granting users in other tenancies the "Administrator" permission is a major security risk. It provides excessive access and undermines the principle of least privilege, exposing your resources to potential misuse.B. While resource-level policies can be more specific and secure, using service-level policies might be necessary depending on the communication method and required actions. Don,t force resource-level policies if they limit functionality or create unnecessary complexity.D. Granting broad permissions directly contradicts the principle of least privilege. It increases the attack surface and makes it harder to maintain security.Therefore, the most crucial practice is to regularly review and update your IAM policies. This ensures they:
Reflect current access needs: Adjust permissions as user roles or resource usage changes.
Adhere to the principle of least privilege: Grant only the minimum required permissions.
Minimize security risks: Address potential vulnerabilities and unauthorized access.