Limit number of connections: registry value MaxInstanceCountComputerHKLM\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services
- Policy ID
- TS_MAX_CON_POLICY
- Scope
- Computer Configuration
- Supported on
- At least Windows Server 2003
- Source
- Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
- Category
- Windows Components › Remote Desktop Services › Remote Desktop Session Host › Connections
Registry
MaxInstanceCount
REG_DWORDComputer- Enabled value
- Depends on the option value
- Element
- RD Maximum Connections allowed
- Value type
- REG_DWORD
- Minimum value
- 1
- Maximum value
- 999999
Apply with .reg · CMD · PowerShell
.reg
Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services] ; Value names and types follow the ADMX. Replace <enter value> below with your own data "MaxInstanceCount"=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 NT\Terminal Services" /v "MaxInstanceCount" /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 NT\Terminal Services' -Force | Out-Null New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services' -Name 'MaxInstanceCount' -PropertyType DWord -Value '<enter value>' -Force | Out-Null