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Exchange must not send auto replies to remote domains.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| Exch-ED-224 | Exch-ED-224 | Exch-ED-224_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. 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. |
| 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, AutoReplyEnabled If the value of "AutoReplyEnabled" 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'> -AutoReplyEnabled $false |