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# AWS::EC2::ClientVpnEndpoint DirectoryServiceAuthenticationRequest
<a name="aws-properties-ec2-clientvpnendpoint-directoryserviceauthenticationrequest"></a>

Describes the Active Directory to be used for client authentication.

## Syntax
<a name="aws-properties-ec2-clientvpnendpoint-directoryserviceauthenticationrequest-syntax"></a>

To declare this entity in your Amazon CloudFormation template, use the following syntax:

### JSON
<a name="aws-properties-ec2-clientvpnendpoint-directoryserviceauthenticationrequest-syntax.json"></a>

```
{
  "[DirectoryId](#cfn-ec2-clientvpnendpoint-directoryserviceauthenticationrequest-directoryid)" : String
}
```

### YAML
<a name="aws-properties-ec2-clientvpnendpoint-directoryserviceauthenticationrequest-syntax.yaml"></a>

```
  [DirectoryId](#cfn-ec2-clientvpnendpoint-directoryserviceauthenticationrequest-directoryid): String
```

## Properties
<a name="aws-properties-ec2-clientvpnendpoint-directoryserviceauthenticationrequest-properties"></a>

`DirectoryId`  <a name="cfn-ec2-clientvpnendpoint-directoryserviceauthenticationrequest-directoryid"></a>
The ID of the Active Directory to be used for authentication.  
*Required*: Yes  
*Type*: String  
*Update requires*: [Replacement](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)