Azure Communication Services (ACS) is a managed cloud service that provides you with communication capabilities, including the ability to make and/or receive phone calls, sending and/or receiving text messages, making audio and video calls over IP and hosting group meetings and chat.
You have two ways for doing what you want:
1) Create an azure Functions that interact with ACS
2) Use REST APIs (limited).
For sms integration, I suggest the Azure Function approach. I will try to explain a solution in a blog post.
