# Additional Services

Hosting providers can provide links to external services to Plesk users, who see these links in the Plesk’s Control Panel. Partner Central enables you to turn on a link to a service and specify the URL of this service.

To select services and configure links through Partner Central, go to the Product Configurations tab, select the required product configuration from the list, and then click Additional Services in the Plesk server configuration section. The settings are applied to all Plesk servers whose licenses are associated with the selected product configuration.

For example, if you run an online support service at http://premium-support.example.com, and want to include the support option into Plesk’s hosting plans, you should select the option Show Link to Online Support Service and specify the URL of the service (http://premium-support.example.com). A button will be added to Plesk’s Control Panel with the link to the online support service.

For the overview of additional services, refer to the Plesk Administrator’s Guide, section Offer Additional Services.

## Access to Premium Commercial Applications

This option enables you to configure Plesk so that the Plesk’s website owners to could buy premium applications. Learn more in the Plesk Administrator’s Guide, section How Apps Become Available to Your Customers.

## Mail Service

You can remove mail service-related controls from the Plesk’s Control Panel. The mail service remains working, but Plesk users cannot use it. Learn more in the Plesk Administrator’s Guide, section Mail Service Controls.

## Purchasing and Viewing SSL Certificates

Plesk users can purchase SSL certificates via the SSL It! extension. Learn more in the Plesk Administrator’s Guide, section Securing Connections with the SSL It! Extension.

## Extra Services

This option enables you to configure the link to extra services, for example, services that are available at the MyPlesk.com online store.

## Online Support

This option enables you to configure the link to online support services. Learn more in the Plesk Administrator’s Guide, section Link to Online Support Service.

## Matching Errors to Knowledge Base Articles

When an error occurs in Plesk, users can view corresponding knowledge base articles. To enable users to view the articles, specify the URL of the knowledge base, for example, http://kb.plesk.com.