To log on to Partner Central, go to https://central.plesk.com and enter
your credentials.
Note: Partner Central has a single sign-on with Key Administrator. If you
were using Key Administrator before, you need to enable global
login in your account settings in Key Administrator to be able to
log on to both Partner Central and Key Administrator, if necessary.
The Partner Central’s UI is organized by tabs (Home, Manage
Licenses, and so on) that are located at the top of the screen.
The name of the current customer is displayed to the left of the tabs.
If you have permissions to manage licenses of other customers, you will
be able to select another customer. For details, see Working with
Multiple Customers.