The DNS server implementation must disable accounts when the accounts have expired.

Disabling expired, inactive, or otherwise anomalous accounts supports the concepts of least privilege and least functionality, which reduce the attack surface of the system.

Verify the DNS server implementation is configured to disable accounts when the accounts have expired.

If the DNS server implementation is not configured to disable accounts when the accounts have expired, this is a finding.

Configure the DNS server implementation to disable accounts when the accounts have expired.