No never had it working. It's Microsoft's key API for interacting with Office 365, etc. I suspect it is more to do with my understanding of the R functions, and how to use the API.
Oh I had a bear of a time in trying to authenticate, outside of Active Directory. I could not get this to work for my specific problem, most likely due to restrictions from my work, but I found I got the closest to a solution using the AzureGraph and companion apps: https://github.com/Azure/AzureGraph
Not sure if you have used these already. The only other thing is to note is make sure you have your app registered on the azure portal with the appropriate permissions, etc.