Azure Immutable Blob Storage is now available in public preview. This feature enables organisations, particularly those in the finance sector, to store data in a manner compliant with strict regulations for information storage management.
Azure Immutable Blob Storage allows users to store business-critical data in Azure blob storage in a WORM (Write Once Read Many) state, making it non-erasable, and non-modifiable for a user-specified interval of time.
There is no additional cost for using this feature.
For details you can read the announcement in full on the official Microsoft Azure blog website here.