I know I've been a little quieter than usual recently. No new blog posts, no new samples...you'd think I was taking a break. In reality, I've been heads-down working on the https://dev.outlook.com portal that we recently launched. If you haven't checked it out, you should! There's step-by-step tutorials for the Outlook REST APIs for .NET, Node.js, and Ruby, and there's more in the works. The tutorials that require you to register your app manually even have an inline form so you can get a client ID and secret directly from the tutorial page.
That leads me to today's news. I'm happy to announce that we've expanded that app registration tool into a stand-alone page: https://dev.outlook.com/appregistration. Now you can register your apps that use the Mail, Calendar, or Contacts APIs with a simple tool. The best part is, all you need is an Office 365 account. No Azure subscription required!
A caveat: at this time, the tool only supports delegated permissions, so you cannot use this too to register apps that will use the client credential auth flow.
If you're developing or planning to develop with the Outlook APIs, please give this tool a try, especially if you've had problems with registering via the Azure management portal. If you do try the tool, please send feedback! We're still working out the feedback channel for the site, so in the meantime, leave it in the comments below, or send it to me on Twitter: @JasonJohMSFT.