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Set-SmbClientConfiguration

Sets the SMB client configuration.

Networking / Security · Risk: High · Documentation Verified

Last verified: 2026-10-26

Microsoft SmbShare reference: Sets the SMB client configuration. The syntax and selected example below are adapted from the pinned Windows Server 2025 reference. Module availability, target configuration and delegated permissions determine whether it can run in your environment. Documentation and parameter text: Microsoft, CC BY 4.0; formatting adapted by Cmdlet World. No execution testing is claimed.

Set-SmbClientConfiguration [-AuditInsecureGuestLogon <Boolean>]
 [-AuditServerDoesNotSupportEncryption <Boolean>] [-AuditServerDoesNotSupportSigning <Boolean>]
 [-BlockNTLM <Boolean>] [-CompressibilitySamplingSize <UInt64>] [-CompressibleThreshold <UInt64>]
 [-ConnectionCountPerRssNetworkInterface <UInt32>] [-DirectoryCacheEntriesMax <UInt32>]
 [-DirectoryCacheEntrySizeMax <UInt32>] [-DirectoryCacheLifetime <UInt32>]
 [-DisableCompression <Boolean>] [-DormantFileLimit <UInt32>]
 [-EnableBandwidthThrottling <Boolean>] [-EnableByteRangeLockingOnReadOnlyFiles <Boolean>]
 [-EnableCompressibilitySampling <Boolean>] [-EnableInsecureGuestLogons <Boolean>]
 [-EnableLargeMtu <Boolean>] [-EnableLoadBalanceScaleOut <Boolean>] [-EnableMailslots <Boolean>]
 [-EnableMultiChannel <Boolean>] [-EnableSecuritySignature <Boolean>] [-EnableSMBQUIC <Boolean>]
 [-EncryptionCiphers <String>] [-ExtendedSessionTimeout <UInt32>]
 [-FileInfoCacheEntriesMax <UInt32>] [-FileInfoCacheLifetime <UInt32>]
 [-FileNotFoundCacheEntriesMax <UInt32>] [-FileNotFoundCacheLifetime <UInt32>]
 [-ForceSMBEncryptionOverQuic <Boolean>] [-InvalidAuthenticationCacheLifetime <UInt32>]
 [-KeepConn <UInt32>] [-MaxCmds <UInt32>] [-MaximumConnectionCountPerServer <UInt32>]
 [-OplocksDisabled <Boolean>] [-RequestCompression <Boolean>] [-RequireEncryption <Boolean>]
 [-RequireSecuritySignature <Boolean>] [-SessionTimeout <UInt32>] [-SkipCertificateCheck <Boolean>]
 [-Smb2DialectMax <Smb2DialectMax>] [-Smb2DialectMin <Smb2DialectMin>]
 [-UseOpportunisticLocking <Boolean>] [-WindowSizeThreshold <UInt32>] [-Force]
 [-CimSession <CimSession[]>] [-ThrottleLimit <Int32>] [-AsJob] [-WhatIf] [-Confirm]
 [<CommonParameters>]

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Required permissions

Use an account with the target resource permissions documented for Set-SmbClientConfiguration. Modifying administrative cmdlets may require elevation or delegated administration. This catalog does not assert that ordinary users can execute the command.

Supported environments

Windows / SmbShare · Windows Server 2025 documentation; feature/module prerequisites apply

Parameters

-AsJob: Runs the cmdlet as a background job. Use this parameter to run commands that take a long time to complete.
-AuditInsecureGuestLogon: Specifies whether to audit insecure guest logon attempts. Audit events are written to the Windows event log.
-AuditServerDoesNotSupportEncryption: Specifies whether to audit when a server doesn't support encryption. If this parameter is specified, events will be logged when a server doesn't support encryption.
-AuditServerDoesNotSupportSigning: Specifies whether to audit when a server doesn't support message signing. If this parameter is specified, events will be logged when a server doesn't support message signing.
-BlockNTLM: Specifies whether to block NT LAN Manager (NTLM) authentication. If this parameter is set to $true, NTLM authentication will be blocked forcing the connection to use another negotiated authentication method, such as Kerberos. If set to $false (default), NTLM authentication will be allowed.
-CimSession: Runs the cmdlet in a remote session or on a remote computer. Enter a computer name or a session object, such as the output of a New-CimSession or Get-CimSession cmdlet. The default is the current session on the local computer.
-CompressibilitySamplingSize: Specifies the size in bytes to sample in a file to look for compressible data. Although the parameter type is UInt64, the sampling size can be specified up to a maximum of 9,007,199,254,740,992 (9 PiB).
-CompressibleThreshold: Specifies the threshold in bytes in which to attempt to find compressible data. Although the parameter type is UInt64, the threshold can be specified up to a maximum of 9,007,199,254,740,992 (9 PiB).
-Confirm: Prompts you for confirmation before running the cmdlet.
-ConnectionCountPerRssNetworkInterface: Specifies the SMB connection count per each RSS network interface.
-DirectoryCacheEntriesMax: Specifies the maximum cache entries that can be in the directory cache.
-DirectoryCacheEntrySizeMax: Specifies the maximum size of directory cache entry.
-DirectoryCacheLifetime: Specifies the directory cache lifetime.

Prerequisites

Windows with the SmbShare module and the Windows feature or management tools that provide it. Confirm target connectivity and version compatibility using the linked Microsoft reference.

Security considerations

This cmdlet changes system state. Review every target and parameter in the official reference, test outside production, and prepare an appropriate backup or rollback. Do not execute the example automatically.

Examples

Example 1: Set the SMB client configuration

Set-SmbClientConfiguration -ConnectionCountPerRssNetworkInterface 8 -Confirm:$false

This command sets the SMB client configuration without user confirmation. Source: Microsoft, CC BY 4.0; transcript prompt/output removed. This example was not executed.

Sources

https://github.com/MicrosoftDocs/windows-powershell-docs/blob/b7645dd8c687139b28e845119da30ec670526507/docset/winserver2025-ps/SmbShare/Set-SmbClientConfiguration.md

https://learn.microsoft.com/powershell/module/smbshare/set-smbclientconfiguration?view=windowsserver2025-ps

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