By default you are able to manage up to 10 databases in the regular licenses. If you are facing this problem, you would need to access the service portal.
Enter your login details in:
If you do not have a password, you would need to see who else in your company has the password. If there’s no password at all, please contact email@example.com
Once you are logged in, please click on “My Partnership> Administer Databases”. In the dropdown list, pick your customer, and see how many databases are registered for him.
Here is a YouTube video explaining the process: