请问企业怎么使用钉钉的服务端的群会话接口

[font='Microsoft Yahei', 微软雅黑, Arial]写着仅限企业接入使用，怎么用呢，需要申请开通吗
[font='Microsoft Yahei', 微软雅黑, Arial]https://oapi.dingtalk.com/chat/create?access_token=ACCESS_TOKEN
[font='Microsoft Yahei', 微软雅黑, Arial]https://oapi.dingtalk.com/chat/update?access_token=ACCESS_TOKEN
[font='Microsoft Yahei', 微软雅黑, Arial]https://oapi.dingtalk.com/chat/get?access_token=ACCESS_TOKEN
[font='Microsoft Yahei', 微软雅黑, Arial]https://oapi.dingtalk.com/chat/send?access_token=ACCESS_TOKEN