What are some best practices to prevent the Office 365 error CAA20002 from occurring frequently in an organization?

To prevent frequent CAA20002 errors: 1. Implement Robust Device Management: Utilize Azure AD Join/Hybrid Azure AD Join and MDM (e.g., Intune) for corporate devices to ensure compliance. 2. Design Well-Defined Conditional Access Policies: Plan policies carefully using 'report-only' mode initially, and regularly review sign-in logs to preemptively identify access blocks. 3. Maintain Consistent Network Configuration: Ensure all required Microsoft 365 endpoints are allowlisted in firewalls/proxies and are not subject to SSL inspection. 4. Provide Regular User Training: Educate users on device compliance, MFA, and strong password practices. 5. Utilize Microsoft Support and Recovery Assistant (SaRA): Encourage users to run SaRA for self-help. 6. Monitor Azure AD Sign-in Logs and Health: Proactively monitor for failures and subscribe to Microsoft 365 service health notifications. 7. Keep Software Updated: Ensure Office applications and operating systems are regularly updated for the latest fixes.