Oracle support policies as they apply to Oracle software running in Microsoft Azure or on Windows Server Hyper-V are covered in two My Oracle Support (MOS) notes.
Oracle provides license mobility for customers who want to run Oracle software on Microsoft Azure. See Licensing Oracle Software in the Cloud Computing Environment (PDF).
Oracle’s strategy is to offer a broad portfolio of solutions for public and private clouds, while giving customers choice and flexibility in how they deploy Oracle software in Oracle clouds as well as other clouds. Oracle’s partnership with Microsoft enables customers to deploy Oracle software in Microsoft public and private clouds with the confidence of certification and support from Oracle. Oracle’s commitment and investment in Oracle public and private cloud solutions is unchanged.