Hi @sns ,
maybe this link is helpful to backup an Azure VM using an Azure Recovery Services Vault:
https://learn.microsoft.com/en-us/azure/backup/quick-backup-vm-portal
You could use the Backup Policy DefaultPolicy
or you can create your own custom Backup Policy based on your requirements:
https://learn.microsoft.com/en-us/azure/backup/quick-backup-vm-portal#create-a-custom-policy
(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)
Regards
Andreas Baumgarten