Hello,
I will help you fix the issue with the number of subdomains counting as single items on your Plesk Server and configure all required services and tools for better working performance.
I have 10+ years of experience and knowledge as a system administrator, setup and management of different Linux Web Hosting Servers, AWS, Azure, Cloud Servers, Server Monitoring, Server Security, Server Optimisation, Mailing Servers, Email Marketing, SSL, DNS, Apache, Nginx, etc with Cpanel, Plesk, Virtualmin or other panels services, Virtualmin LAMP Stack, Tomcat, Mysql/MariaDB, Zimbra, Postfix mail server, Mailenable, more innovative mail, MSSQL, etc.
If you're interested in my proposal please don't hesitate to reach out so we can talk more about the project.
thank you.