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Close-SmbOpenFile

Closes a file that is open by one of the clients of the SMB server.

Networking / Security · Risk: High · Documentation Verified

Last verified: 2026-10-26

Microsoft SmbShare reference: Closes a file that is open by one of the clients of the SMB server. 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.

Close-SmbOpenFile [[-FileId] <UInt64[]>] [-SessionId <UInt64[]>] [-ClientComputerName <String[]>]
 [-ClientUserName <String[]>] [-ScopeName <String[]>] [-ClusterNodeName <String[]>]
 [-SmbInstance <SmbInstance>] [-Force] [-CimSession <CimSession[]>] [-ThrottleLimit <Int32>] [-AsJob]
 [-PassThru] [-WhatIf] [-Confirm] [<CommonParameters>]

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Required permissions

Use an account with the target resource permissions documented for Close-SmbOpenFile. 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.
-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.
-ClientComputerName: Specifies the client computer name to filter the returned open files so that only the matching files are opened.
-ClientUserName: Specifies the name of the user for which the open files are retrieved.
-ClusterNodeName: Specifies, if a share is hosted by a windows cluster, the name of the server which is hosting the open files to be retrieved.
-Confirm: Prompts you for confirmation before running the cmdlet.
-FileId: Specifies the file identifier (ID) of the file to forcibly close.
-Force: Forces the command to run without asking for user confirmation.
-InputObject (required): Specifies the input object that is used in a pipeline command.
-PassThru: Returns an object representing the item with which you are working. By default, this cmdlet does not generate any output.
-ScopeName: Specifies the scope of the open files to be retrieved.
-SessionId: Specifies a session ID. Only files that have been opened in the specified session will be returned.
-SmbInstance: Specifies the input to this cmdlet. You can use this parameter, or you can pipe the input to this cmdlet.
-ThrottleLimit: Specifies the maximum number of concurrent operations that can be established to run the cmdlet. If this parameter is omitted or a value of 0 is entered, then Windows PowerShell® calculates an optimum throttle limit for the cmdlet based on the number of CIM cmdlets that are running on the computer. The throttle limit applies only to the current cmdlet, not to the session or to the computer.
-WhatIf: Shows what would happen if the cmdlet runs. The cmdlet is not run.

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: Close an open file

Close-SmbOpenFile -FileId 4415226383589

This command closes a file identified as 4415226383589 that is open by one of the clients of the SMB server. 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/Close-SmbOpenFile.md

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

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