text: ---
  external help file: Microsoft.ActiveDirectory.Management.dll-Help.xml
  Module Name: ActiveDirectory
  online version: 
  schema: 2.0.0
  title: Revoke-ADAuthenticationPolicySiloAccess
  ms.author: v-anbarr
  ms.reviewer: brianlic
  description: 
  keywords: powershell, cmdlet
  author: andreabarr
  manager: jasgro
  ms.date: 2017-10-30
  ms.topic: reference
  ms.prod: powershell
  ms.technology: powershell
  ms.assetid: 75A6E9C8-F2B1-4C04-86AC-9FECAADDFA8B
  ---
  
  # Revoke-ADAuthenticationPolicySiloAccess
  
  ## SYNOPSIS
  Revokes membership in an authentication policy silo for the specified account.
  
  ## SYNTAX
  
  ```
  Revoke-ADAuthenticationPolicySiloAccess [-WhatIf] [-Confirm] [-Account] <ADAccount> [-AuthType <ADAuthType>]
   [-Credential <PSCredential>] [-Identity] <ADAuthenticationPolicySilo> [-PassThru] [-Server <String>]
   [<CommonParameters>]
  ```
  
  ## DESCRIPTION
  The **Revoke-ADAuthenticationPolicySiloAccess** cmdlet revokes the membership in an authentication policy silo for one or more accounts in Active Directory® Domain Services.
  
  The **Identity** parameter specifies the Active Directory Domain Services authentication policy silo that contains the user accounts to remove.
  You can identify an authentication policy silo by its distinguished name, GUID or name.
  You can also use the **Identity** parameter to specify a variable that contains an authentication policy silo object, or you can use the pipeline operator to pass an authentication policy object to the **Identity** parameter.
  
  The **Account** parameter specifies the users, computers and service accounts to remove from the authentication policy silo specified by the **Identity** parameter.
  You can identify a user, computer or service account by its distinguished name, GUID, security identifier (SID), or Security Accounts Manager (SAM) account name.
  You can also use the **Account** parameter to specify a variable that contains user, computer, and service account objects.
  
  ## EXAMPLES
  
  ### Example 1: Revoke access to an authentication policy silo
  ```
  PS C:\>Revoke-ADAuthenticationPolicySiloAccess -Identity AuthenticationPolicySilo01 -Account User01 -Confirm:$False
  ```
  
  This command revokes access to the authentication policy silo named AuthenticationPolicySilo01 for the user account named User01.
  Because the Confirm parameter is set to $False, no confirmation message appears.
  
  ### Example 2: Revoke access to an authentication policy silo for filter matches
  ```
  PS C:\>Get-ADComputer -Filter 'Name -like "newComputer*"' | Revoke-ADAuthenticationPolicySiloAccess -Identity AuthenticationPolicySilo02
  Confirm
  Are you sure you want to perform this action? 
  Performing the operation "Set" on target "CN=Silo,CN=AuthN Silos,CN=AuthN PolicyConfiguration,CN=Services,CN=Configuration,DC=DC01,DC=Contoso,DC=com".
  [Y] Yes  [A] Yes to All  [N] No  [L] No to All  [S] Suspend  [?] Help (default is "Y"): A
  ```
  
  This command first uses the Get-ADComputer cmdlet to get a list of computers that match the filter specified by the Filter parameter.
  The output is then passed to the Revoke-ADAuthenticationPolicySiloAccess to remove access to the authentication policy silo named AuthenticationPolicySilo02.
  Because the Confirm parameter is not specified, a confirmation message appears.
  
  ## PARAMETERS
  
  ### -Account
  Specifies the account to remove from the authentication policy silo.
  Specify the account in one of the following formats: 
  
  - A distinguished name
   -- GUID 
  - security identifier 
  - SAM account name
  
  The cmdlet searches the default naming context or partition to find the object.
  If two or more objects are found, the cmdlet returns a non-terminating error.
  
  You can also use this parameter to specify a variable that contains user, computer, and service account objects.
  
  ```yaml
  Type: ADAccount
  Parameter Sets: (All)
  Aliases: 
  
  Required: True
  Position: 1
  Default value: None
  Accept pipeline input: True (ByValue)
  Accept wildcard characters: False
  ```
  
  ### -AuthType
  Specifies the authentication method to use.
  The acceptable values for this parameter are:
  
  - Negotiate or 0
  - Basic or 1
  
  The default authentication method is Negotiate.
  A Secure Sockets Layer (SSL) connection is required for the Basic authentication method.
  
  ```yaml
  Type: ADAuthType
  Parameter Sets: (All)
  Aliases: 
  Accepted values: Negotiate, Basic
  
  Required: False
  Position: Named
  Default value: Microsoft.ActiveDirectory.Management.AuthType.Negotiate
  Accept pipeline input: False
  Accept wildcard characters: False
  ```
  
  ### -Confirm
  Prompts you for confirmation before running the cmdlet.
  
  ```yaml
  Type: SwitchParameter
  Parameter Sets: (All)
  Aliases: cf
  
  Required: False
  Position: Named
  Default value: False
  Accept pipeline input: False
  Accept wildcard characters: False
  ```
  
  ### -Credential
  Specifies a user account that has permission to perform the task.
  The default is the current user.
  Type a user name, such as User01 or Domain01\User01, or enter a **PSCredential** object, such as one generated by the Get-Credentialhttp://go.microsoft.com/fwlink/?LinkID=293936 cmdlet.
  
  By default, the cmdlet uses the credentials of the currently logged on user unless the cmdlet is run from an Active Directory Domain ServicesWindows PowerShell provider drive.
  If you run the cmdlet in a provider drive, the account associated with the drive is the default.
  
  If you specify credentials that do not have permission to perform the task, the cmdlet returns an error.
  
  ```yaml
  Type: PSCredential
  Parameter Sets: (All)
  Aliases: 
  
  Required: False
  Position: Named
  Default value: None
  Accept pipeline input: False
  Accept wildcard characters: False
  ```
  
  ### -Identity
  Specifies an **ADAuthenticationPolicySilo** object.
  Specify the authentication policy silo object in one of the following formats: 
  
  - A distinguished name
  - A GUID
  - A name
  
  This parameter can also get this object through the pipeline or you can set this parameter to an object instance.
  
  The cmdlet searches the default naming context or partition to find the object.
  If the cmdlet finds two or more objects, the cmdlet returns a non-terminating error.
  
  ```yaml
  Type: ADAuthenticationPolicySilo
  Parameter Sets: (All)
  Aliases: 
  
  Required: True
  Position: 0
  Default value: None
  Accept pipeline input: False
  Accept wildcard characters: False
  ```
  
  ### -PassThru
  Returns an object representing the item with which you are working.
  By default, this cmdlet does not generate any output.
  
  ```yaml
  Type: SwitchParameter
  Parameter Sets: (All)
  Aliases: 
  
  Required: False
  Position: Named
  Default value: None
  Accept pipeline input: False
  Accept wildcard characters: False
  ```
  
  ### -Server
  Specifies the Active Directory Domain Services instance to which to connect, by providing one of the following values for a corresponding domain name or directory server.
  The service may be any of the following:  Active Directory Lightweight Domain Services, Active Directory Domain Services or Active Directory snapshot instance.
  
  Specify the Active Directory Domain Services instance in one of the following ways:  
  
   Domain name values: 
  
  - Fully qualified domain name
  - NetBIOS name
  
   Directory server values:  
  
  - Fully qualified directory server name
  - NetBIOS name
  - Fully qualified directory server name and port
  
  The default value for this parameter is determined by one of the following methods in the order that they are listed:
  
  - By using the **Server** value from objects passed through the pipeline
  - By using the server information associated with the Active Directory Domain ServicesWindows PowerShell provider drive, when the cmdlet runs in that drive
  - By using the domain of the computer running Windows PowerShell
  
  ```yaml
  Type: String
  Parameter Sets: (All)
  Aliases: 
  
  Required: False
  Position: Named
  Default value: None
  Accept pipeline input: False
  Accept wildcard characters: False
  ```
  
  ### -WhatIf
  Shows what would happen if the cmdlet runs.
  The cmdlet is not run.
  
  ```yaml
  Type: SwitchParameter
  Parameter Sets: (All)
  Aliases: wi
  
  Required: False
  Position: Named
  Default value: False
  Accept pipeline input: False
  Accept wildcard characters: False
  ```
  
  ### CommonParameters
  This cmdlet supports the common parameters: -Debug, -ErrorAction, -ErrorVariable, -InformationAction, -InformationVariable, -OutVariable, -OutBuffer, -PipelineVariable, -Verbose, -WarningAction, and -WarningVariable. For more information, see about_CommonParameters (http://go.microsoft.com/fwlink/?LinkID=113216).
  
  ## INPUTS
  
  ### None or Microsoft.ActiveDirectory.Management.ADAuthenticationPolicySilo
  This cmdlet accepts an authentication policy silo object.
  
  ## OUTPUTS
  
  ### None or Microsoft.ActiveDirectory.Management.ADAuthenticationPolicySilo
  This cmdlet returns the modified authentication policy silo object when the **PassThru** parameter is specified.
  By default, this cmdlet does not generate any output.
  
  ## NOTES
  
  ## RELATED LINKS
  
  [Grant-ADAuthenticationPolicySiloAccess](./Grant-ADAuthenticationPolicySiloAccess.md)
  
  [AD DS Administration Cmdlets in Windows PowerShell](./ActiveDirectory.md)
  
  