> For the complete documentation index, see [llms.txt](https://docs.tnid.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tnid.com/api-reference/002_company/007_b2c_subscriptions/009__update_b2c_subscription_topic.md).

# Update B2C Subscription Topic

GraphQL endpoint: `/company`

Updates one of the company's B2C subscription topics; only the provided fields change. The topic name must stay unique within the company. Once a topic has subscribers its `name` and `type` are both fixed — they are what those people consented to — while the description and the per-channel flags stay editable.

## Query

```graphql
mutation (
  $id: ID!
  $name: String
  $description: String
  $type: B2cSubscriptionTopicType
  $enableEmail: Boolean
  $enableSms: Boolean
  $enableVoice: Boolean
) {
  updateB2cSubscriptionTopic (
    id: $id
    name: $name
    description: $description
    type: $type
    enableEmail: $enableEmail
    enableSms: $enableSms
    enableVoice: $enableVoice
  ) {
    id
    name
    description
    type
    enableEmail
    enableSms
    enableVoice
  }
}

```

## Variables

```json
{
  "description": "test description",
  "enableEmail": true,
  "enableSms": false,
  "enableVoice": true,
  "id": "00000000-0000-4000-8000-000000000001",
  "name": "test topic",
  "type": "CRITICAL"
}
```

## Response

```json
{
  "data": {
    "updateB2cSubscriptionTopic": {
      "description": "test description",
      "enableEmail": true,
      "enableSms": false,
      "enableVoice": true,
      "id": "00000000-0000-4000-8000-000000000001",
      "name": "test topic",
      "type": "CRITICAL"
    }
  }
}
```