The new arrival who just got keys: activation and the first-week walk-through
Power does not follow the tenancy contract automatically. In Dubai you activate a DEWA account against your Ejari; in Abu Dhabi it is ADDC (or AADC in Al Ain) against your Tawtheeq; Sharjah runs through SEWA; and Ajman, Umm Al Quwain, Ras Al Khaimah and Fujairah are served by Etihad Water and Electricity. All require a refundable security deposit, higher for villas than flats, and most activations are same-day or next-day once documents are in order.
Your first week is the only window where every defect is unambiguously the landlord's. Walk the property with a cheap plug-in socket tester, press the test button on each RCD to confirm it actually trips, run each water heater, and flip every light switch including balcony and bathroom extractors. Dead sockets, missing switch plates, flickering fixtures and RCDs that do not respond to the test button all go on the snag list before you move furniture in front of them.