I'm trying to use OAuth to connect to Exchange using their API. I'm not sure how to go about registering my application. I looked at this, but the step by step link is no longer available. I need a valid authorization URL and token exchange URL.
There's a much easier OAuth flow that Exchange supports now. We've updated most of our tutorials to use this flow on https://dev.outlook.com/restgettingstarted (only iOS uses the v1 flow). Registration happens on https://apps.dev.microsoft.com and is fairly straightforward.