Licensing of each product is different, as you didn't identify what product you are interested in 😐 I will outline the standard strategy for each of our products.
SSPR - Is licensed by the number of active profiles. When a user sets up credentials for self-service this counts as one license. Disable accounts, and accounts that have never logged into our system are not counted.
VPN - is licensed by the number of users that have been issued a VPN configuration. Therefore, this is the total number of users, not concurrent users, that could use the system at any one time. Each user can have up to 3 devices for the Professional Edition so, in theory, the supported concurrent count is 3 times the user count.
Directory - this is a new product that is not currently available to buy but in the interests of clarity for others that may stumble across this in the future, our paid-for plans will be licensed per user.
Thanks for stopping by.