Specify maximum log file size: registry value MaximumLogFileSizeComputerHKLM\Software\Policies\Microsoft\Netlogon\Parameters

Policy ID: Netlogon_MaximumLogFileSize
Scope: Computer Configuration
Supported on: At least Windows Server 2003
Source: Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
Category: System › Net Logon

Registry

MaximumLogFileSize

REG_DWORDComputer

HKLM\Software\Policies\Microsoft\Netlogon\Parameters Current key

Enabled value: Depends on the option value
Element: Bytes:
Value type: REG_DWORD
Required: true
Maximum value: 4294967295

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Netlogon\Parameters]

; Value names and types follow the ADMX. Replace <enter value> below with your own data
"MaximumLogFileSize"=dword:<enter value>

CMD

:: Value names and types follow the ADMX. Replace <enter value> below with your own data

reg add "HKLM\Software\Policies\Microsoft\Netlogon\Parameters" /v "MaximumLogFileSize" /t REG_DWORD /d "<enter value>" /f

PowerShell

# Value names and types follow the ADMX. Replace <enter value> below with your own data

New-Item -Path 'HKLM:\Software\Policies\Microsoft\Netlogon\Parameters' -Force | Out-Null
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Netlogon\Parameters' -Name 'MaximumLogFileSize' -PropertyType DWord -Value '<enter value>' -Force | Out-Null