You will have to activate the license on every subsite ( site1, site2, site3). Eg: If you have subsites as, www.domaninname/site1 www.domaninname/site2 www.domaninname/site3Our system recognizes the name of the URL www.domaninname/site1 is different from www.domaninname/site2 meaning that you will need to buy a license for every subsite in order to activate them on all sites.