Today, we are pleased to offer seamless upgrade of classic Backup or Site Recovery vaults to ARM based Recovery Services vaults.
Last May 2016, we announced the General Availability of Recovery Services (RS) vault based on the Azure Resource Manager for Azure Backup and Azure Site Recovery. Since then, we announced many new features for both services which are available only with Recovery Services vaults. The new upgrade feature allows customers on the older classic vaults of both Backup and ASR to seamlessly upgrade to RS vault with minimal downtime, no loss of data, recovery points or configuration settings, and take advantage of all the new features available with RS vaults.
Read about it on the Azure blog.