Allow createUploadSession to work for app level tokens
The largest file size that can be uploaded to OneDrive and SharePoint using app level tokens is limited to 4MB. This is because the createUploadSession is not supported with app level tokens. I have already opened a ticket with Microsoft and they recommended that I also post the issue to UserVoice. Here is the URL to the question I posted to stackoverflow.com that was answered by Marc LaFleur at Microsoft. https://stackoverflow.com/questions/45219202/cannot-delete-an-upload-session
My support number is 617071993492551. The timeline given for a fix is "soon". The best estimate that I was given was two months which puts the deadline at the end of September 2017. The first time the timeline "soon" was mentioned was June 21, 2017. The issue was fixed on July 7, 2017 but was then rolled back.
Still no answer yet?
I would love this, app level tokens are very convenient for my app and large uploads are a big part of it. It's hard to find information about the topic.