If the NAS is running DSM 7: FAQ 31: Reset / Reclaim PMS on DSM 7 (Not Authorized - Locked Out)
If the NAS is running DSM 6: FAQ 15: Claiming & Connecting to a troublesome Synology server
If the NAS is running DSM 7: FAQ 31: Reset / Reclaim PMS on DSM 7 (Not Authorized - Locked Out)
If the NAS is running DSM 6: FAQ 15: Claiming & Connecting to a troublesome Synology server