COMMAND EVERYTHING.
Creates a DFS namespace.
Microsoft DFSN reference: Creates 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 New-DfsnRoot. Modifying administrative cmdlets may require elevation or delegated administration. This catalog does not assert that ordinary users can execute the command.
Windows / DFSN · Windows Server 2025 documentation; feature/module prerequisites apply
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-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, the 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, 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 a target 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 for the DFS namespace to the users and user groups specified. Users can add, remove, and modify namespace folders and folder targets.
-Path- Specifies a path for the root of a DFS namespace. This path must be unique. This path cannot be the name of an existing DFS namespace.
-ReferralPriorityClass- Specifies the target priority class for a DFS namespace root. Target priority offers you the ability to classify and rank in-site targets. You can specify targets to receive the highest or lowest preference, and you can divide the remaining targets based on their site cost for a DFS client to connect to them. The acceptable values for this parameter are: - GlobalHigh - The highest priority class for a DFS target. Targets assigned this class receive global preference. - SiteCostHigh - The highest site cost priority class for a DFS target. Targets assigned this class receive the most preference among targets of the same site cost for a given DFS client. - SiteCostNormal - The middle or normal site cost priority class for a DFS target. - SiteCostLow - The lowest site cost priority class for a DFS target. Targets assigned this class receive the least preference among targets of the same site cost for a given DFS client. - GlobalLow - The lowest level of priority class for a DFS target. Targets assigned this class receive the least preference globally.
-ReferralPriorityRank- Specifies the priority rank, as an integer, for a root target of the DFS namespace. Lower values have greater preference. A value of zero (0) is the greatest preference.
-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.
-TargetPath (required)- Specifies a path for a root target of the DFS namespace.
-TargetState- Specifies the state of the DFS namespace root target. The acceptable values for this parameter are: - Online - Offline Clients do not receive referrals for a DFS namespace folder target that is Offline.
-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.
-Type (required)- Specifies the type of a DFS namespace as a Type object. The acceptable values for this parameter are: - Standalone - Specifies a stand-alone namespace. - DomainV1 - Specifies a Windows 2000 Server mode domain namespace. - DomainV2 - Specifies a Windows Server 2008 mode domain namespace.
-WhatIf- Shows what would happen if the cmdlet runs. The cmdlet is not run.
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.
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.