Plesk license determines

• What Plesk functionality is available when using a particular Plesk instance

• How many Plesk logical objects (Customer accounts, Domain accounts, mailboxes, web users, etc.) can be created in a particular Plesk instance

Plesk Administrator has full set of privileges required for managing Plesk license. The following operations are available via Plesk XML API protocol:

• Retrieving information on the currently installed Plesk license key

• Installing new license key

• Reverting to a previously used license key

• Installing additional keys (required for Plesk add-ons) linked with the Plesk license key

• Retrieving additional keys installed on the server