Adds a new external RADIUS server for VPN authentication, accounting for DirectAccess (DA) and VPN, or one-time password (OTP) authentication for DA.
Networking / Security · Risk: High · Documentation Verified
Last verified: 2026-10-26
Microsoft RemoteAccess reference: Adds a new external RADIUS server for VPN authentication, accounting for DirectAccess (DA) and VPN, or one-time password (OTP) authentication for DA. 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 Add-RemoteAccessRadius. Modifying administrative cmdlets may require elevation or delegated administration. This catalog does not assert that ordinary users can execute the command.
Supported environments
Windows / RemoteAccess · Windows Server 2025 documentation; feature/module prerequisites apply
Parameters
-AccountingOnOffMsg
Indicates the enabled state for sending of accounting on or off messages. The acceptable values for this parameter are: -- Enabled. -- Disabled. This is the default value. This parameter is applicable only when the RADIUS server is being added for Remote Access accounting.
-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.
-ComputerName
Specifies the IPv4 or IPv6 address, or host name, of the computer on which the remote access server computer-specific tasks should be executed. If this parameter is specified when adding a RADIUS server for authentication, then it is added for the VPN server represented by this parameter value.
-Confirm
Prompts you for confirmation before running the cmdlet.
-EntrypointName
Specifies the identity of a site in a multi-site deployment. This parameter is applicable only to RADIUS server configuration for VPN authentication. It is not applicable to RADIUS accounting and OTP and hence is ignored when a user tries to add a radius server for these purposes. When this parameter is specified it indicates that the RADIUS server for VPN authentication should be added for that site. If this parameter is not specified in a multi-site deployment, then this parameter value for the server on which the cmdlet is run is used. The server could also be represented by using the ComputerName parameter. If this parameter and ComputerName parameter are specified and the ComputerName parameter value does not belong to the site represented by this parameter value, then this parameter takes precedence and the RADIUS server is added to it.
-MsgAuthenticator
Specifies the enabled state for the usage of message authenticator. The acceptable values for this parameter are: -- Enabled. -- Disabled. This is the default value. This parameter is applicable only when the RADIUS server is being added for VPN authentication.
-PassThru
Returns an object representing the item with which you are working. By default, this cmdlet does not generate any output.
-Port
Specifies the port number on which the RADIUS server is accepting authentication requests. The default value is 1813.
-Purpose (required)
Specifies the purpose for which the external RADIUS server is being added. The acceptable values for this parameter are: -- Authentication. -- Accounting. -- Otp.
-Score
Specifies the initial score. The default value is 30.
-ServerName (required)
Specifies the IPv4 or IPv6 address, or host name, of the external RADIUS server.
-SharedSecret (required)
Specifies the shared secret between the VPN server and the specified external RADIUS server. Note: The secret is specified in clear text.
-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.
-Timeout
Specifies the timeout value in seconds. The default value is 5 (seconds).
-WhatIf
Shows what would happen if the cmdlet runs. The cmdlet is not run.
Prerequisites
Windows with the RemoteAccess 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 example adds the RADIUS server named 10.1.2.1 for the purpose of VPN authentication. Source: Microsoft, CC BY 4.0; transcript prompt/output removed. This example was not executed.