See https://developer.microsoftmoderator.com/docs/services/57c7426e2703740ec4c9f4c3/operations/57c7426f27037407c8cc69e6.

• Get email alias photodna -at- wikimedia -dot- org
• Sign up for new Microsoft account with that email alias
• Make sure Microsoft reps know that it's the account we'll use for production use
• Set up the new account in our configuration in production
• Store the username and password somewhere that it can be retrieved by someone besides Evan if needed.