SV-279940r1156561: Access to Microsoft 365 Copilot writing assistance must be disabled. | Microsoft Edge STIG SCAP Benchmark

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Assessment Title

Rule Text

Access to Microsoft 365 Copilot writing assistance must be disabled.

Description

Discussion Text

This policy controls whether users can use writing support features in Microsoft Edge for Business, such as Rewrite, which utilizes Microsoft 365 Copilot Chat.

How this relates to the STIG checklist: STIG vs SCAP benchmark.

IA Controls

NIST SP 800-53

Not mappedCCI-000381

References

DPMS Target Microsoft Edge DISA DPMS Target Microsoft Edge 5280

Checks

DISA STIG (Manual Reference)

The policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Control access to Microsoft 365 Copilot writing assistance in Microsoft Edge for Business" must be set to "disabled".

Use the Windows Registry Editor to navigate to the following key:
HKLM\SOFTWARE\Policies\Microsoft\Edge

If the value for "ComposeInlineEnabled" is not set to "REG_DWORD = 0", this is a finding.

SCC Automation Reference

The reconstructed evaluation script behind this rule's OVAL check(s) — every module a compound check combines, with this rule's own concrete values and DISA's SCC tool's real per-module mechanism curated from static teardown of SCC releases.

# Windows PowerShell
# Reconstructed from oval:mil.disa.stig.edge:def:279940
# Access to Microsoft 365 Copilot writing assistance must be disabled.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# Access to Microsoft 365 Copilot writing assistance is disabled
# registry_object (registry_test)
function test_1 {
  return (((@{String='reg_sz';ExpandString='reg_expand_sz';Binary='reg_binary';DWord='reg_dword';MultiString='reg_multi_sz';QWord='reg_qword';None='reg_none'}[(Get-Item -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Edge').GetValueKind('ComposeInlineEnabled').ToString()]) -eq 'reg_dword') -and (((Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Edge' -Name 'ComposeInlineEnabled' -ErrorAction SilentlyContinue) | Select-Object -ExpandProperty 'ComposeInlineEnabled') -eq 0))
}

if (test_1) {
  Write-Output "PASS"
} else {
  Write-Output "FAIL"
}

Assessment Script Powered by AISyntax-verified

A standalone PowerShell script to assess this control automatically. Review before running it in your environment.

Syntax-checked as valid PowerShell. Not executed here — running it for real needs the actual ms_edge target this check assesses.

# oval:mil.disa.stig.edge:def:279940
if (-not (Test-Path -Path "HKLM:\SOFTWARE\Policies\Microsoft\Edge\ComposeInlineEnabled") -or (Get-ItemProperty -Path "HKLM:\SOFTWARE\Policies\Microsoft\Edge\ComposeInlineEnabled" -ErrorAction SilentlyContinue).value -eq 0) {Write-Output "PASS"; Exit 0} else {Write-Output "FAIL"; Exit 1}

Remediation

Set the policy value for "Control access to Microsoft 365 Copilot writing assistance in Microsoft Edge for Business" to "disabled".