Effective April 3, 2017, Azure API Management will be available only in the Azure portal. Access from the classic portal will no longer be supported.
The Publisher portal remains accessible from the Azure portal. A separate effort is underway to transition functionality from the Publisher portal to the Azure portal. After that effort is complete, the Publisher portal will be deprecated as well. You can learn more on our public roadmap.
We encourage customers to try API Management in the Azure portal and provide us feedback. Our documentation already reflects using the Azure portal. You can learn how to get started in the API Management documentation.