The Internet Fax Feature must be disabled.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-17661	DTOO198	SV-52747r2_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 STIG	2017-06-20

Details

Check Text ( C-47076r3_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 hive: HKEY_Users For every users profile hive under HKEY_Users, navigate to the following key: \Software\Policies\Microsoft\Office\15.0\common\services\fax If the value “NoFax” is REG_DWORD = 1 for every user profile hive, this is not a finding.

Check Text ( C-47076r3_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 hive:
HKEY_Users

For every users profile hive under HKEY_Users, navigate to the following key:
\Software\Policies\Microsoft\Office\15.0\common\services\fax

If the value “NoFax” is REG_DWORD = 1 for every user profile hive, this is not a finding.

Fix Text (F-45673r1_fix)
Set the policy value for User Configuration -> Administrative Templates -> Microsoft Office 2013 -> Services -> Fax "Disable Internet Fax feature" to "Enabled"