Every license is legitimate for just one domain. If you'd like to install this module/topic on multiple sites, make sure you order multiple licenses. Each individual license is valid for just one domain. If you would like install this module/topic on multiple sites, be sure to invest in multiple licenses. https://socialbuzzmaster.com/story4002380/how-much-you-need-to-expect-you-ll-pay-for-a-good-login-back-office