Your company has an Azure subscription that leverages Microsoft Defender for Cloud for enhanced security measures. Recently, your company secured a contract with a department within the United States government, which necessitates adherence to specific security standards. One such standard is the NIST 800-53 compliance framework, which outlines security and privacy controls for federal information systems and organizations. To ensure your Azure subscription aligns with these newly required standards, what is the initial step you should take to assess the compliance with NIST 800-53?