Change the maximum number of connections per host (HTTP 1.1): registry value iexplore.exeUserHKCU\Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_MAXCONNECTIONSPERSERVER

Policy ID: IESF_MaxConnectionPerServer
Scope: Computer Configuration, User Configuration
Supported on: At least Internet Explorer 8.0
Source: Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
Category: Windows Components › Internet Explorer › Security Features › AJAX

Registry

iexplore.exe

REG_DWORDUserComputer

…\Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_MAXCONNECTIONSPERSERVERHKCU\Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_MAXCONNECTIONSPERSERVER Current key
HKLM\Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_MAXCONNECTIONSPERSERVER

Enabled value: Depends on the option value
Element: Maximum number of connections:
Value type: REG_DWORD
Minimum value: 2
Maximum value: 128

Apply with .reg · CMD · PowerShell

UserPer-account setting

.reg

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_MAXCONNECTIONSPERSERVER]

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

CMD

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

reg add "HKCU\Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_MAXCONNECTIONSPERSERVER" /v "iexplore.exe" /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 'HKCU:\Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_MAXCONNECTIONSPERSERVER' -Force | Out-Null
New-ItemProperty -Path 'HKCU:\Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_MAXCONNECTIONSPERSERVER' -Name 'iexplore.exe' -PropertyType DWord -Value '<enter value>' -Force | Out-Null

ComputerMachine-wide setting

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_MAXCONNECTIONSPERSERVER]

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