Hi. I'm trying to access information from our Project Online installation from a remote server using the REST interface. I'm having trouble getting anything other than a 403 on api calls.
What I've done:
- Registered the app using the AppRegNew.aspx page. Successfully got a client id and secret.
- Set the permissions using the AppInv.aspx page. Included all the scopes for sharepoint as "FullControl" as well as all the Project specific scopes.
- Obtained a token successfully, but the token gave me authorization errors.
- Was told that the Project REST resources require user permissions - I added the attribute AllowAppOnlyPolicy="false" to the AppPermisionsRequests element
Now, when I try to obtain a token I do indeed need to enter a user id and password. However, when I enter my credentials (which are the same as used to register the app, and as far as I know have maximum permissions on every asset, since I created the account and manage the subscriptions), it gives me an authentication error and won't issue a token. The message on the error is:

So I'm pretty stalled... any trailhead to trying something different would be greatly appreciated!
Thanks,
Rod