Forced progression option to courses
The course creator can choose that the course contents have to be studied in a specific order.
User invitation - Added a possibility to add a user account expiration date when inviting a new user
Course access settings - Added a possibility to set course access by user role
Password validation is made more strict
Improvements to the subscription service
Changed the minimal number of required characters in Task course search to 3.
Improvements to the open assignment certificates
Fixes to the registration email