 FORUM in Moodle 2.9 A new setting, post a copy to all groups, means that a teacher who is working with several groups in a forum needs only post once to all the groups. Here's a forum which has three separate groups and the teacher has access to all of them. She can post different messages to each group or if she wants to post the same message then she only needs to post this message once and then she can select the box to post a copy to all groups or if she only has access to certain groups then she'll only be able to post to those groups she has access to. So although she only makes one post, once this is saved, as you see, the same message is repeated for each group so members of the individual groups can reply.