Amazon WorkSpaces introduces support for cross-Region redirection
Amazon WorkSpaces now allows you to use a fully qualified domain name (FQDN) as your Amazon WorkSpaces registration code. When your end users log in to WorkSpaces, you can then redirect them across Amazon WorkSpaces Regions based on your Domain Name System (DNS) policies for the FQDN. Amazon WorkSpaces cross-Region redirection works with both public domain names and domain names in private DNS zones. The new feature is designed for customers who deploy WorkSpaces in multiple Regions to achieve regional resiliency and high availability.
Source:: Amazon AWS