Exchange must not send auto replies to remote domains.
An XCCDF Rule
Description
Attackers can use automated messages to determine whether a user account is active, in the office, traveling, and so on. An attacker might use this information to conduct future attacks. Remote users will not receive automated 'Out Of Office' delivery reports. This setting can be used to determine if all the servers in the Organization can send 'Out of Office' messages.
| Property | Value |
|---|---|
| IA Controls | ECSC-1 |
- ID
- SV-44023r1_rule
- Version
- Exch-2-814
- Severity
- Medium
- Updated
Remediation Templates
A Manual Procedure
Open the Exchange Management Shell and enter the following command:
Set-RemoteDomain -Identity <'RemoteDomainName'> -AutoReplyEnabled $false