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# AWS::Cognito::UserPoolDomain CustomDomainConfigType
<a name="aws-properties-cognito-userpooldomain-customdomainconfigtype"></a>

The configuration for a hosted UI custom domain.

## Syntax
<a name="aws-properties-cognito-userpooldomain-customdomainconfigtype-syntax"></a>

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

### JSON
<a name="aws-properties-cognito-userpooldomain-customdomainconfigtype-syntax.json"></a>

```
{
  "[CertificateArn](#cfn-cognito-userpooldomain-customdomainconfigtype-certificatearn)" : {{String}}
}
```

### YAML
<a name="aws-properties-cognito-userpooldomain-customdomainconfigtype-syntax.yaml"></a>

```
  [CertificateArn](#cfn-cognito-userpooldomain-customdomainconfigtype-certificatearn): {{String}}
```

## Properties
<a name="aws-properties-cognito-userpooldomain-customdomainconfigtype-properties"></a>

`CertificateArn`  <a name="cfn-cognito-userpooldomain-customdomainconfigtype-certificatearn"></a>
The Amazon Resource Name (ARN) of an AWS Certificate Manager SSL certificate. You use this certificate for the subdomain of your custom domain.  
*Required*: No  
*Type*: String  
*Pattern*: `arn:[\w+=/,.@-]+:[\w+=/,.@-]+:([\w+=/,.@-]*)?:[0-9]+:[\w+=/,.@-]+(:[\w+=/,.@-]+)?(:[\w+=/,.@-]+)?`  
*Minimum*: `20`  
*Maximum*: `2048`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)