Recently I worked on one project where I integrated the contacts and groups from SharePoint to Exchange Online. I want to share the approach that I followed to do this.
I used PowerShell scripts to create objects (Contacts and Groups) in Exchange Online. Initially, I thought of using Azure Functions with C#, but it’s not possible as there is no API exposed for Exchange Online. I used MS Flow to trigger my PowerShell scripts that I have developed in Runbooks (Azure Automation) on Create/Update of sharepoint list item. We have an action in Flow to create a job of a particular Runbook (Azure Automation –> Create job).
The reason to use MS Flow for this requirement is to develop an application with low-code which facilitates the customer to perform some basic changes without need of a developer.
Happy to hear the feedback on my approach.