Disable SMB compression

Supported on: At least Windows Server 2022, Windows 11

Registry

HKLM Software\Policies\Microsoft\Windows\LanmanServer

Value name: DisableCompression

Enabled: DisableCompression = 1

Disabled: DisableCompression = 0

Description

This policy controls whether the SMB server will disable (completely prevent) traffic compression. If you enable this policy setting, the SMB server will never compress data, irrespective of other policies (such as the 'Use SMB compression by default' policy or per-share property). If you disable or do not configure this policy setting, the SMB server may compress traffic (depending on a combination of other policies and conditions).