Can manage private message in groups and users (admin panel) in groups too

Since i use RC, I have many message with my collegue and the list is very long.
I’d like to create group of users (classified by services or direction by example, or project, hobbies, etc …) to clear my RC workspaces.

Add the possiblity ta create groups users too in the admin panel to better manage them.

This groups are not linked with the AD groups (but, why not ?!)