By default activities in groupfolders are only generated for the current user. This is due to the logic of groupfolders. There is a config flag activity_use_cached_mountpoints that makes activities in groupfolders work like in normal shares when set to true .
*This config option comes with the following limitations:
If âAdvanced Permissionsâ (ACLs) are enabled in a groupfolder, the activities donât respect the permissions and therefore all users see all activities, even for files and directories they donât have access to. This potentially leaks sensitive information! See this issue for more information.*