You can use the `enable_internal_extension` field in External Contacts APIs. The field is available in response payloads for GET requests and can be set in request payloads for POST and PATCH requests. Now you can manage whether an external contact can use an internal extension.

Support for enable_internal_extension in External Contacts APIs


## Added
- New `enable_internal_extension` response field in the following  **External Contacts** APIs:
	- `GET /v2/accounts/{accountId}/phone/external_contacts/{externalContactId}`
	- `GET /v2/phone/external_contacts/{externalContactId}`
	- `GET /v2/phone/external_contacts`
	- `GET /v2/accounts/{accountId}/phone/external_contacts`
- New `enable_internal_extension` request field in the following  **External Contacts** APIs:
	- `PATCH /v2/accounts/{accountId}/phone/external_contacts/{externalContactId}`
	- `PATCH /v2/phone/external_contacts/{externalContactId}`
	- `POST /v2/phone/external_contacts`
	- `POST /v2/accounts/{accountId}/phone/external_contacts`
