| 1.1 Ensure 'Enable sender ID agent' is configured | SYSTEM AND INFORMATION INTEGRITY |
| 1.2 Ensure 'Configure sender filtering' is set to 'Enabled' | SYSTEM AND INFORMATION INTEGRITY |
| 1.3 Ensure 'Sender reputation' is configured | SYSTEM AND INFORMATION INTEGRITY |
| 1.4 Ensure 'Blank sender field' is configured | SYSTEM AND INFORMATION INTEGRITY |
| 1.5 Ensure 'Spam quarantine mailbox exists' is set to '' | SYSTEM AND INFORMATION INTEGRITY |
| 1.6 Ensure 'SCL Quarantine' is 'Enabled' | SYSTEM AND INFORMATION INTEGRITY |
| 1.7 Ensure 'Nonexistent recipients' is set to 'True' | SYSTEM AND INFORMATION INTEGRITY |
| 1.8 Ensure 'Attachment Filtering Agent' is configured | SYSTEM AND INFORMATION INTEGRITY |
| 1.9 Ensure 'Maximum receive size: Connector level' is set to '25' | SYSTEM AND COMMUNICATIONS PROTECTION |
| 1.10 Ensure 'Transport Pickup Directory Path' is not set | CONFIGURATION MANAGEMENT |
| 1.11 Ensure 'Exchange recipient filter' is set to 'True' | SYSTEM AND INFORMATION INTEGRITY |
| 1.12 Ensure 'Internet-facing receive connectors' is set to 'Tls, BasicAuth, BasicAuthRequireTLS' | ACCESS CONTROL, IDENTIFICATION AND AUTHENTICATION, SYSTEM AND COMMUNICATIONS PROTECTION |
| 4.1 Ensure 'Receive connector: Configure protocol logging' is set to 'Verbose' | AUDIT AND ACCOUNTABILITY |
| 4.3 Ensure 'Turn on connectivity logging' is set to 'True' | AUDIT AND ACCOUNTABILITY |
| 4.4 Ensure 'Send connector: Configure protocol logging' is set to 'Verbose' | AUDIT AND ACCOUNTABILITY |
| 4.5 Ensure 'Message tracking logging' is set to 'True' | AUDIT AND ACCOUNTABILITY |
| Authentication Failure | |
| CIS_Microsoft_Exchange_Server_2019_v1.0.0_Level_1_Edge.audit from CIS Microsoft Exchange Server 2019 Benchmark v1.0.0 | SYSTEM AND INFORMATION INTEGRITY |
