u/bob4IT

Our 35,000 user tenant is having trouble with all of our API calls from external apps. In troubleshooting, I am finding that anything that connects to SharePoint via the Graph API is getting access denied. The API connection succeeds, but subsequent calls to the target SharePoint site either times out or gets a 401 access denied error. I have a Sev A ticket open with Microsoft but haven’t received a response. Typically, when I don’t get a response from a sev A, it’s because there is an outage with something but there is nothing indicated on service health or any clues on X or subreddits.

Can anyone please test some graph api calls to SPO? Like a set command with a PNP.PowerShell or something you know connects to a SPO site?