Can I add users to a license?

the limitation of 2 concurrent activations per license still holds with teams and enterprise licenses.

You may not share an individual license

A Team plan allows you to buy as many licenses as you need

Team license links that may help
NOTE - an individual plan MAY be used for a business purpose... a team plan is appropriate where the business is going to (A) pay for the plans and (B) assign or reassign the plan to employees, such as when an employee is replaced due to leaving or moving to a different job
-team plans https://www.adobe.com/creativecloud/plans.html?plan=team
-https://community.adobe.com/t5/Enterprise-Teams/bd-p/enterprise-and-teams
-http://www.adobe.com/creativecloud/buy/business.html
-https://helpx.adobe.com/contact/creative-cloud-teams.html for Team help
-manage your team account https://community.adobe.com/t5/Get-Started/Creative-Cloud-for-Teams-FAQ-How-can-I-manage-my-teams-account/td-p/8101442
-Team Installer https://community.adobe.com/t5/Get-Started/HOW-TO-Your-very-own-Adobe-Update-Server-Windows/td-p/5753372
--https://helpx.adobe.com/creative-cloud/packager/create-license-file.html