I just installed the latest Emby beta a few days ago and they migrated the Trakt.tv plugin from a ‘system’ based plugin to ‘user’ based so that each user on the system can track their own stuff. It does not mention this anywhere. I had Trakt setup for me only (as the admin) prior to this update but realized nothing I’ve watched the last few days was marked. You have to go into your user profile and their will now be a setting for Trakt and you have to reauthorize (Get PIN) per account to continue using this.
No complaints, no issues, just letting people know if their status stops updating. 