Set authentication rate limiter delay (milliseconds): registry value InvalidAuthenticationDelayTimeInMsComputerHKLM\Software\Policies\Microsoft\Windows\LanmanServer

Policy ID: Pol_AuthRateLimiterDelayInMs
Scope: Computer Configuration
Supported on: -
Source: Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
Category: Network › Lanman Server

Registry

InvalidAuthenticationDelayTimeInMs

REG_DWORDComputer

HKLM\Software\Policies\Microsoft\Windows\LanmanServer Current key

Enabled value: Depends on the option value
Element: Value (milliseconds):
Value type: REG_DWORD
Required: true
Maximum value: 10000
Minimum value: 0

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\LanmanServer]

; Value names and types follow the ADMX. Replace <enter value> below with your own data
"InvalidAuthenticationDelayTimeInMs"=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\Windows\LanmanServer" /v "InvalidAuthenticationDelayTimeInMs" /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\Windows\LanmanServer' -Force | Out-Null
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\LanmanServer' -Name 'InvalidAuthenticationDelayTimeInMs' -PropertyType DWord -Value '<enter value>' -Force | Out-Null