anonymous user,
Thank you for reaching out to the Microsoft Q&A platform. Happy to answer your question.
What version are you planning to upgrade to? Windows 10 single-session, and Windows 10 Enterprise multi-session, all versions support in-place system upgrade. So, if any new patch is released, you can upgrade through windows update. Microsoft does not support an upgrade of the operating system of a Microsoft Azure Virtual Machine. (For more information, see KB [4014997][1]
.) Instead, you should create a new Azure virtual machine that is running the supported version of the operating system that is required and then migrates the workload.
I hope I answered your question. If not, please provide additional details, so that I can help you.