Remote Desktop Services: Must be configured with the client connection encryption set to High Level

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Remote connections must be encrypted to prevent interception of data or sensitive information. Selecting "High Level" will ensure encryption of Remote Desktop Services sessions in both directions.

Remediation

To fix this configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Remote Desktop Services >> Remote Desktop Session Host >> Security >> "Set client connection encryption level" to "Enabled" and "High Level".

STIG: Server: https://www.stigviewer.com/stig/windows_server_2019/2020-06-15/finding/V-92973
Desktop: https://www.stigviewer.com/stig/windows_10/2021-08-18/finding/V-220852

NIST 800-53: AC-17(2),AC-17(a),CM-6(a),MA-4(6),SC-12(2),SC-12(3),SC-13
NIAP: FCS_SSHS_EXT.1
CCE: CCE-82176-9
SRG-OS-000033-GPOS-00014, SRG-OS-000250-GPOS-00093
SRG-OS-000373-GPOS-00157, SRG-OS-000373-GPOS-00156
CIS CSC v8.0: 12.7