Setup recovery vault for resource manager-deployed virtual machines & backup-snapshot on Azure

Taking Snapshots and VM Backups on Azure Cloud – Prepare environment by creating recovery vault on Azure portal (Resource Manager Model & Classic Model)

steps to create recovery service vault:

https://azure.microsoft.com/en-us/documentation/articles/backup-azure-arm-vms-prepare/

To recover a VM to a point in time follow the steps

https://azure.microsoft.com/en-us/documentation/articles/backup-azure-arm-restore-vms/