Microsoft DFSN reference: Changes settings for a DFS namespace. 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.
Use an account with the target resource permissions documented for Set-DfsnRoot. Modifying administrative cmdlets may require elevation or delegated administration. This catalog does not assert that ordinary users can execute the command.
Supported environments
Windows / DFSN · 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. The cmdlet immediately returns an object that represents the job and then displays the command prompt. You can continue to work in the session while the job completes. To manage the job, use the *-Job cmdlets. To get the job results, use the Receive-Job cmdlet. For more information about Windows PowerShell background jobs, see about_Jobs.
-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.
-Confirm
Prompts you for confirmation before running the cmdlet.
-Description
Specifies a description for a DFS namespace.
-EnableAccessBasedEnumeration
Indicates whether a DFS namespace uses Access-based enumeration. If this value is $true, a DFS namespace server shows a user only the files and folders that the user can access.
-EnableInsiteReferrals
Indicates whether a DFS namespace server provides a client only with referrals that are in the same site as the client. If this value is $true, a DFS namespace server provides only in-site referrals. If this value is $false, the DFS namespace server provides in-site referrals first, then other referrals.
-EnableRootScalability
Indicates whether a DFS namespace uses root scalability mode. If this value is $true, DFS namespace servers connect to the nearest domain controllers for periodic namespace updates. If this value is $false, the servers connect to the primary domain controller (PDC) emulator.
-EnableSiteCosting
Indicates whether a DFS namespace uses cost-based selection. If a client cannot access a folder target in-site, a DFS namespace server selects the least resource-intensive alternative. If you provide a value of $true for this parameter, the DFS namespace favors high-speed links over wide area network (WAN) links.
-EnableTargetFailback
Indicates whether a DFS namespace uses target failback. If a client attempts to access target link on a server and that server is not available, the client fails over to another referral. If this value is $true, once the first server becomes available again, the client fails back to the first server. If this value is $false, the DFS namespace server does not require the client to fail back to the preferred server.
-GrantAdminAccounts
Specifies an array of accounts. This cmdlet grants management permissions the users and user groups specified for the DFS namespace. Users can add, remove, and modify namespace folders and folder targets.
-Path (required)
Specifies a path for the root of a DFS namespace.
-RevokeAdminAccounts
Specifies an array of accounts. This cmdlet removes management permissions for the users and user groups specified for the DFS namespace.
-State
Specifies the state of the DFS namespace root. The acceptable values for this parameter are: - Online - Offline Clients do not receive referrals for a DFS namespace folder that is offline. If you set a namespace root to a value of Offline, the entire namespace becomes inaccessible.
-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.
-TimeToLiveSec
Specifies a TTL interval, in seconds, for referrals. Clients store referrals to root targets for this length of time. The default TTL interval for root referrals is 300 seconds.
-WhatIf
Shows what would happen if the cmdlet runs. The cmdlet is not run.
Prerequisites
Windows with the DFSN 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.
This command modifies settings for the DFS namespace that has the path \\Contoso\AccountingResources. The command enables root scalability, which allows the DFS namespace server to poll domain controllers for updates. The command also sets the referral TTL interval to 900 seconds. Source: Microsoft, CC BY 4.0; transcript prompt/output removed. This example was not executed.