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Auto-forwarding email must be disabled.


Overview

Finding ID Version Rule ID IA Controls Severity
Exch-ED-223 Exch-ED-223 Exch-ED-223_rule Medium
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. Ensure Automatic Forwards to remote domains are disabled. Before enabling this setting first configure a remote domain.
STIG Date
Microsoft Exchange 2010 Edge Transport Server Role 2012-05-31

Details

Check Text ( C-_chk )
Open the Exchange Management Shell and enter the following command.

Get-RemoteDomain | select identity, AutoForwardEnabled

If the value of "AutoForwardEnabled" is set to "True", this is a finding.
Fix Text (F-_fix)
Open the Exchange Management Shell and enter the following command.

Set-RemoteDomain -Identity <'RemoteDomainName'> -AutoForwardEnabled $false