The option to opt-in to the new data centres went live end of July. There is no cost to change and there should very minimal to noimpact on the front-end, so business users won’t even know it’s happening. For the IT Pros out there, please take note of some additional settings to sort out with this. To opt-in, go to your Microsoft 365 Admin Centre and follow the links like this. The migration can take up to 2 years to complete.