This issue requires modifying styles in the app, either using DOM inspector or a remote theme. This issue only needs to be tested in 1 device. In the app, login in master site. Go to MM Dev Testing > Forum > Standard forum ("foro") ... Open any discussion. Check that you can see the author's group name in the posts. Add the following style in the app, either using DOM inspector or a remote theme:  .core-groupname {     display: none; } If you used a remote theme, go to Site Preferences and click to Synchronize. After doing that, restart the app. Go to the forum again and open any discussion. Check that now you don't see the group name in the posts.