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Turn on bandwidth optimization: registry value UseBandwidthOptimization and 1 moreComputerHKLM\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services

Policy ID
RA_Optimize_Bandwidth
Scope
Computer Configuration
Supported on
At least Windows Vista
Source
Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
Category
System › Remote Assistance

Registry

UseBandwidthOptimization

REG_DWORDComputer
HKLM\Software\policies\Microsoft\Windows NT\Terminal Services Current key
Enabled value
1
Disabled value
0
Apply with .reg · CMD · PowerShell
.reg
Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\policies\Microsoft\Windows NT\Terminal Services]

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

:: Enabled
reg add "HKLM\Software\policies\Microsoft\Windows NT\Terminal Services" /v "UseBandwidthOptimization" /t REG_DWORD /d 1 /f
:: Disabled
reg add "HKLM\Software\policies\Microsoft\Windows NT\Terminal Services" /v "UseBandwidthOptimization" /t REG_DWORD /d 0 /f
PowerShell
# Common: create the key
New-Item -Path 'HKLM:\Software\policies\Microsoft\Windows NT\Terminal Services' -Force | Out-Null

# Options (use only one)
# Enabled
New-ItemProperty -Path 'HKLM:\Software\policies\Microsoft\Windows NT\Terminal Services' -Name 'UseBandwidthOptimization' -PropertyType DWord -Value 1 -Force | Out-Null
# Disabled
New-ItemProperty -Path 'HKLM:\Software\policies\Microsoft\Windows NT\Terminal Services' -Name 'UseBandwidthOptimization' -PropertyType DWord -Value 0 -Force | Out-Null

OptimizeBandwidth

REG_DWORDComputer
HKLM\Software\policies\Microsoft\Windows NT\Terminal Services Current key
Enabled value
Depends on the option value
Element
Optimize settings for reduced bandwidth:
Options
ItemStored value
No optimization14
No full window drag12
Turn off background8
Full optimization0
Apply with .reg · CMD · PowerShell
.reg
Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\policies\Microsoft\Windows NT\Terminal Services]

; Options (use only one)
; No optimization
"OptimizeBandwidth"=dword:0000000e
; No full window drag
"OptimizeBandwidth"=dword:0000000c
; Turn off background
"OptimizeBandwidth"=dword:00000008
; Full optimization
"OptimizeBandwidth"=dword:00000000
CMD
:: Options (use only one)

:: No optimization
reg add "HKLM\Software\policies\Microsoft\Windows NT\Terminal Services" /v "OptimizeBandwidth" /t REG_DWORD /d 14 /f
:: No full window drag
reg add "HKLM\Software\policies\Microsoft\Windows NT\Terminal Services" /v "OptimizeBandwidth" /t REG_DWORD /d 12 /f
:: Turn off background
reg add "HKLM\Software\policies\Microsoft\Windows NT\Terminal Services" /v "OptimizeBandwidth" /t REG_DWORD /d 8 /f
:: Full optimization
reg add "HKLM\Software\policies\Microsoft\Windows NT\Terminal Services" /v "OptimizeBandwidth" /t REG_DWORD /d 0 /f
PowerShell
# Common: create the key
New-Item -Path 'HKLM:\Software\policies\Microsoft\Windows NT\Terminal Services' -Force | Out-Null

# Options (use only one)
# No optimization
New-ItemProperty -Path 'HKLM:\Software\policies\Microsoft\Windows NT\Terminal Services' -Name 'OptimizeBandwidth' -PropertyType DWord -Value 14 -Force | Out-Null
# No full window drag
New-ItemProperty -Path 'HKLM:\Software\policies\Microsoft\Windows NT\Terminal Services' -Name 'OptimizeBandwidth' -PropertyType DWord -Value 12 -Force | Out-Null
# Turn off background
New-ItemProperty -Path 'HKLM:\Software\policies\Microsoft\Windows NT\Terminal Services' -Name 'OptimizeBandwidth' -PropertyType DWord -Value 8 -Force | Out-Null
# Full optimization
New-ItemProperty -Path 'HKLM:\Software\policies\Microsoft\Windows NT\Terminal Services' -Name 'OptimizeBandwidth' -PropertyType DWord -Value 0 -Force | Out-Null