Thomas Rushton troubleshoots a billing issue:
So you signed up for a three year deal to keep costs down and more predictable. But while Reservations can make Azure spend more predictable, they can’t make it completely static. You’ll be OK if you’re paying in USD, but if your organisation is billed in any other currency, you’ll be subject to the vagaries of exchange rates when buying any Azure service.
Read on for a specific instance in which UK customers experienced a fairly significant price change based on the timing of changes in currency exchange rates.