Hi,
We would like to upgrade our Program Type from Apple Developer Program to Apple Developer Enterprise, do we have to redo the whole process with a new account or can we upgrade directly the existing account?
Thanks
Upgrade apple developer program to enterprise
They are two separate programs - you can't 'upgrade' or 'migrate' from one to the other. Each has it's own unique purchase process, related Apple ID/login, etc.
No.
These answer is outdated. Now you can upgrade your individual account to organization account:
https://www.mobiloud.com/help/knowledge-base/convert-apple-developer-program-individual-to-organization