How to receive AD groups from

how do I create org authentication server in Okta. ?
no customer server. By default when you open a new account with Okta. They create for you authentication server by default.
I have to test a few cases for my customer and I want to simulate the same scenario.
Please help.

The Org Authorization Server already exists and does not need to be created. You can find its endpoints for your org at the following URL: