To send SMS notifications to MS Dynamics 365 campaign members, users need to set up their Twilio account, Microsoft account, and Dynamics 365 account, and purchase a Twilio phone number. They then create a new solution in Power Apps and customize the Campaign form to trigger a flow that sends SMS notifications to all members of selected Marketing Lists. The flow is imported from a package and configured with tasks such as getting campaign details, marketing lists, and member information. Users can also define dynamic marketing list criteria using saved views. Once set up, users can test their solution by triggering the flow from within Dynamics 365, which sends SMS notifications to all members of the targeted Marketing Lists. With this integration, users can leverage Twilio's SMS capabilities within MS Dynamics 365 for efficient and effective communication with customers.