The Internet Fax Feature must be disabled.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-228531	DTOO198	SV-228531r508020_rule		Medium

Description
Excel, PowerPoint, and Word users can use the Internet Fax feature to send documents to fax recipients through an Internet fax service provider. If your organization has policies that govern the time, place, or manner in which faxes are sent, this feature could help users evade those policies. By default, Office users can use the Internet Fax feature.

STIG	Date
Microsoft Office System 2013 Security Technical Implementation Guide	2020-09-25

Details

Check Text ( C-30764r498871_chk )
Verify the policy value for User Configuration >> Administrative Templates >> Microsoft Office 2013 >> Services >> Fax "Disable Internet Fax feature" to "Enabled". Use the Windows Registry Editor to navigate to the following HKCU\Software\Policies\Microsoft\Office\15.0\common\services\fax If the value 'NoFax' is REG_DWORD = 1, this is not a finding.

Fix Text (F-30749r498872_fix)
Set the policy value for User Configuration -> Administrative Templates -> Microsoft Office 2013 -> Services -> Fax "Disable Internet Fax feature" to "Enabled".