Outgoing secure channel traffic will be signed when possible.

From Windows Server 2008 R2 Member Server Security Technical Implementation Guide

Part of Signing of Secure Channel Traffic

Associated with IA controls: DCNR-1

SV-32307r1_rule Outgoing secure channel traffic will be signed when possible.

Vulnerability discussion

Requests sent on the secure channel are authenticated, and sensitive information (such as passwords) is encrypted, but the channel is not integrity checked. If this policy is enabled, all outgoing secure channel traffic should be signed.

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Fix text

Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> “Domain Member: Digitally sign secure channel data (when possible)” to “Enabled”.

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