I have a stackoverflow and a MS Developer Network post at the below links:
https://stackoverflow.com/questions/57047044/spring-boot-v2-1-6-microsoft-planner-integration
https://social.msdn.microsoft.com/Forums/en-US/2245bbd4-e431-45db-a86d-af5417e61876/spring-boot-v216...
I was directed to this for forum for MS Planner technical questions by the moderator (https://social.msdn.microsoft.com/profile/dave%20patrick/?ws=usercard-mini) from MDSN.
What I am attempting to implement is a Spring Boot micro-service that wraps the API calls to Microsoft Planner. I have create an Azure app registration with permissions to Groups.Read.All and Users.Read.All (both are delegated permissions). I'm to the point where the service does return a payload with an access_token, but the token does not work when making API to the MS Graph Planner endpoints. Further details about the implementation can be found in the links above.
