Customer keys are protected from attacks for maximum security of their Azure NetApp File volumes using this feature. This capability is now available in US Gov Virginia and US Gov Texas (preview). This increased security complements the additional security for deployments in US Gov. Healthcare, Finance, Government, and many other customers can now protect their customer-managed encryption keys within the secure confines of US Gov regions.
We will roll out support for other US Gov regions as the preview progresses.
To learn more about customer managed keys, see the Configure customer-managed keys for Azure NetApp Files volume encryption | Microsoft Learn