Hello galaxy team, First and foremost, I would like to thank you for your assistance with my galaxy installation with apache proxy. It works very well. Secondly, I would like your help with creating users, groups, roles and permissions that would allow me to: 1. differentiate a student from a teacher 2. differentiate a student in course A or in course B 3. teachers having read access to students' work 4. teachers sharing with students Right now, I just have created users. There is no group or roles or permissions or datasets. On another note, how can I disable the account of one specific user or a whole group ? Cordialement / Regards, Edgar Fernandez System Administrator (Linux) Direction Générale des Technologies de l'Information et de la Communication * Bur. : 1-514-343-6111 poste 16568 Université de Montréal PAVILLON ROGER-GAUDRY, bureau X-218