With the most recent updates to the SharePoint client object model (CSOM) libraries it is now possible to authenticate to SharePoint and Project Online with the MSAL libraries rather than ADAL - and ...
Published Nov 23, 2020
Version 1.0
Blog Post
Does Project Online still support Remove Event Receivers?
We have a requirement to stop publishing a project when there were changes in baseline.
The only reference i get about remote event receivers was from 2019 https://sharepointprojectserver.com/register-remote-event-receiver-to-project-server-project-online-events-using-csom/ and it still using SharePointOnlineCredential (with username and password).
Thanks.
All the best,
Ariwibawa