Translate document with M365 Copilot function disappeared

Hi tpelicari, that does sound like either a feature rollout, licensing issue, or temporary service-side change rather than something wrong with your file. I would first test the same presentation in PowerPoint for the web and in the desktop app with the same signed-in account. Also check that the user still has the correct Microsoft 365 Copilot license assigned and that connected experiences are enabled. If it is missing for multiple users in the same tenant, I would open a Microsoft 365 admin support ticket, because that points more toward tenant rollout or policy than a local client issue.