On-Premises
You can run the Primavera P6 Administrator locally or remotely through a browser. The installation for P6 sets the default URLs for remote access to the Primavera P6 Administrator. You can use the application server's configuration utility to change the listen port number and context root. After launching the Primavera P6 Administrator, you will need to enter an Admin Superuser name and password.
Cloud
Submit a Service Request in My Oracle Support to request access to Primavera P6 Administrator. You will be provided with a URL for Primavera P6 Administrator for your environment. After launching Primavera P6 Administrator, you will need to enter the name and password for a user which has been granted access to Primavera P6 Administrator.