Turn off calls during Quiet Hours: registry value AllowCallsUserHKCU\SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\QuietHours

Policy ID: NoCallsDuringQuietHours
Scope: User Configuration
Supported on: Windows Server 2012 R2, Windows 8.1 or Windows RT 8.1 only
Source: Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
Category: Start Menu and Taskbar › Notifications

Registry

AllowCalls

REG_DWORDUser

HKCU\SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\QuietHours Current key

Enabled value: 0
Disabled value: 1

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\QuietHours]

; Options (use only one)
; Enabled
"AllowCalls"=dword:00000000
; Disabled
"AllowCalls"=dword:00000001

CMD

:: Options (use only one)

:: Enabled
reg add "HKCU\SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\QuietHours" /v "AllowCalls" /t REG_DWORD /d 0 /f
:: Disabled
reg add "HKCU\SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\QuietHours" /v "AllowCalls" /t REG_DWORD /d 1 /f

PowerShell

# Common: create the key
New-Item -Path 'HKCU:\SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\QuietHours' -Force | Out-Null

# Options (use only one)
# Enabled
New-ItemProperty -Path 'HKCU:\SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\QuietHours' -Name 'AllowCalls' -PropertyType DWord -Value 0 -Force | Out-Null
# Disabled
New-ItemProperty -Path 'HKCU:\SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\QuietHours' -Name 'AllowCalls' -PropertyType DWord -Value 1 -Force | Out-Null