The whole portal has been redesigned and now under the “Member Center” and listed as “Certificates, Identifiers & Profiles”.
Apple has finally updated its official developer website with a new, easier-to-manage unified view for managing certificates, identifiers, devices, and provisioning profiles.
Developers were sent an email about the changes, here’s the full note:
Now it’s even easier to manage your development assets. The new Certificates, Identifiers & Profiles section in Member Center provides a unified view and intuitive interface to help you manage all your certificates, identifiers, devices, and provisioning profiles. This new section replaces the iOS Provisioning Portal and the Developer Certificate Utility.
To learn more about testing and distributing apps, read the new App Distribution Guide.