I need to post a message to chatter group in Community with mention. I tried to use ConnectApi.ChatterFeeds.postFeedElement() but I'm receiving this error:
Insufficient Privileges: You do not have the level of access necessary to perform the operation you requested. Please contact the owner of the record or your administrator if access is necessary.
Can Community User do that or only a Standard User can do that? Or maybe I'm missing some settings that I need to enable?