Exchange auto-forwarding email to remote domains must be disabled or restricted.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-259651 | EX19-MB-000021 | SV-259651r942267_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. Verify Automatic Forwards to remote domains are disabled, except for enterprise mail that must be restricted to forward only to .mil and .gov. domains. Before enabling this setting, configure a remote domain. |
| STIG | Date |
|---|---|
| Microsoft Exchange 2019 Mailbox Server Security Technical Implementation Guide | 2024-01-10 |
Details
| Check Text ( C-63390r942265_chk ) |
|---|
| Note: This requirement is not applicable on classified or completely closed networks. For Non-Enterprise Mail: Open the Exchange Management Shell and enter the following command: Get-RemoteDomain | Select-Object -Property Identity, AutoForwardEnabled If the value of AutoForwardEnabled is not set to "False", this is a finding. For Enterprise Mail: If the value of "AutoForwardEnabled" is set to "True", this is not a finding. and In the Exchange Management Shell, enter the following command: Get-RemoteDomain If the value of "RemoteDomain" is not set to ".mil" and/or ".gov" domain(s), this is a finding. |
| Fix Text (F-63298r942266_fix) |
|---|
| For Non-Enterprise Mail: Open the Exchange Management Shell and enter the following command: Set-RemoteDomain -Identity <'IdentityName'> -AutoForwardEnabled $false Note: The For Enterprise Mail: New-RemoteDomain -Name Note: Set-RemoteDomain -Identity <'RemoteDomainIdentity'> -AutoForwardEnabled $true Note: The |