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Set-NfsMappedIdentity

Modifies a mapped identity.

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Last verified: 2026-10-26

Microsoft NFS reference: Modifies a mapped identity. 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-NfsMappedIdentity [-MappingStore <MappingStoreType>] [-Server <String>] [-LdapNamingContext <String>]
 -GroupName <String> -GroupIdentifier <Int32> [-WhatIf] [-Confirm] [<CommonParameters>]

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Required permissions

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

Supported environments

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

Parameters

-Confirm: Prompts you for confirmation before running the cmdlet.
-GroupIdentifier (required): Specifies the group identifier of a mapped identity.
-GroupName (required): Specifies the SAMAccountName of a Windows group account.
-LdapNamingContext: Specifies the Lightweight Directory Access Protocol (LDAP) naming context (directory partition) of an NFS identity mapping store. You can use this parameter to search for mapped identities in the specified naming context.
-MappingStore: Specifies the type of identity mapping store in which the Set-NfsMappedIdentity cmdlet updates a mapped identity. When this parameter is not specified, the Set-NfsMappedIdentity cmdlet gets the store configuration settings from the NFS server. Valid values are AD and LDAP.
-Server: Specifies the LDAP server name of a store that NFS server uses. This can be a domain name, Active Directory Lightweight Directory Services (AD LDS) server name, or LDAP server name. When this parameter is not specified, the cmdlet tries to connect to either the LDAP store on the local computer at port 389 when *MappingStore* is LDAP, or the Active Directory domain of the computer when *MappingStore* is Active Directory.
-UserIdentifier: Specifies a UID to assign to a user account that the *UserName* parameter specifies.
-UserName (required): Specifies the SAMAccountName of a user account.
-WhatIf: Shows what would happen if the cmdlet runs. The cmdlet is not run.

Prerequisites

Windows with the NFS 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: Modify a mapped identity that is stored in an AD LDS instance

Set-NfsMappedIdentity -MappingStore "LDAP" -GroupName "Administrators" -GroupIdentifier 600

This command modifies a mapped identity that is stored in a configured AD LDS instance and that corresponds to the Windows group account Administrators. The command resets the associated group identifier to 600. 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/NFS/Set-NfsMappedIdentity.md

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

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