You should see Welcome to Horizon Workspace! as shown in the following screenshot:
Click on the green Begin Setup Wizard > button to start.
You will now see the Step 1: Setup screen as shown in the following screenshot:
Enter the following information:
License Key (1): If you are using evaluation licenses, the expiry date will be displayed. It's a good idea to take note of this date so that this does not come up as a surprise later!
Password (2): This is the password for the Horizon Workspace admin account, which is not the AD service account. This is the account used for administering the configurator-va appliance.
Confirm Password (3): Confirm the password for the admin account.
Click on Next > to continue to the Step 2: Configure screen.