Exchange OWA must have S/MIME Certificates enabled.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-234795	EX13-CA-000155	SV-234795r617326_rule		Medium

Description
Without protection of the transmitted information, confidentiality and integrity may be compromised since unprotected communications can be intercepted and either read or altered. This requirement applies only to those applications that are either distributed or can allow access to data non-locally. Use of this requirement will be limited to situations where the data owner has a strict requirement for ensuring data integrity and confidentiality is maintained at every step of the data transfer and handling process. When transmitting data, applications need to leverage transmission protection mechanisms, such as TLS, SSL VPNs, or IPsec. Communication paths outside the physical protection of a controlled boundary are exposed to the possibility of interception and modification.

Description

Without protection of the transmitted information, confidentiality and integrity may be compromised since unprotected communications can be intercepted and either read or altered. This requirement applies only to those applications that are either distributed or can allow access to data non-locally. Use of this requirement will be limited to situations where the data owner has a strict requirement for ensuring data integrity and confidentiality is maintained at every step of the data transfer and handling process. When transmitting data, applications need to leverage transmission protection mechanisms, such as TLS, SSL VPNs, or IPsec. Communication paths outside the physical protection of a controlled boundary are exposed to the possibility of interception and modification.

STIG	Date
Microsoft Exchange 2013 Client Access Server Security Technical Implementation Guide	2021-12-16

Details

Check Text ( C-37981r617324_chk )
Open the Exchange Management Shell and enter the following command: Get-OWAVirtualDirectory \| Select Name, Identity, SmimeEnabled If the value returned is not set to True, this is a finding.

Fix Text (F-37944r617325_fix)
Open the Exchange Management Shell and enter the following command: Set-OWAVirtualDirectory -Identity '\owa (Default Web Site)' -SmimeEnabled $true Note: The \owa (Default Web Site) value must be in quotes.