Unexpected Reboot During Autopilot ESP — Diagnosing and Fixing the Device Already Enrolled Error
The Problem Existing hybrid Azure AD-joined, co-managed Windows devices were failing when wiped and re-enrolled through Windows Autopilot. Brand-new devices completed Autopilot without issue every time — the failure was specific to devices with a prior enrollment history. The failure pattern was consistent: Device is wiped and boots into Autopilot OOBE Device setup phase (ESP) proceeds normally During ESP, a shutdown notification unexpectedly appears Shutdown notification appearing mid-ESP — this should not happen during normal Autopilot provisioning ...