While the old forum (pre June 2018) had the notion of public “Wall Posts,” both for Users and Groups, the new software platform does not use this metaphor. For public messages, we recommend that you post a new Topic on your old group’s Category (Groups are essentially now Categories).
In the new site, a “group” is a collection of users, and a “Category” is a collection of Topics. (We can use groups to control who has access to a category, but they are simply not the same thing as they were in the old site.)
We will probably experience some growing pains with how groups work. But, we’ll get through them, and you’ll like the new setup we believe.