- Plesk Onyx for Linux
There is the following message in Extensions > Plesk Premium Mail:
PLESK_INFO: Upgrade the extension license ti gain access to additional functions and features, or to increase the amount of resources available.
What are additional features included in the upgraded license?
The upgraded Plesk Premium Email license provides an additional number of mailboxes available for use. See the following page for the information: Plesk Premium Email, powered by Kolab - Entry (10 users)