Yes, you can purchase and hold a maximum of 3 years worth of active software maintenance for any one license of the PHPKB knowledge base software. You have the option to buy an extra 2 years (24 months) of support & maintenance subscription (additional to free 12 month period) on the order page.
Article ID: 16
Created: August 8, 2011
Last Updated: August 8, 2011
Author: Ajay Chadha [support@phpkb.com]
Online URL: https://www.phpkb.com/kb/article/can-i-purchase-more-than-12-months-of-software-maintenance-16.html