All Services ==> Backup Center ==> "Azure policies for backup"
Choose the policy and clique assisgn
First step : Choose the scope (it can be the mgmt group or subscription or RG)
** Location : the location of your deployed VMs to protect.
** Backup policy : You need to select the subscription + the vault + the policy
** Remediation : The assignment only takes effect for the newly created VMs. The existing VMs ca be updated via a remediation task after the policy is assigned.
** Managed identity : must be created in a region # than the source.
non-compliance messages : alert you that u'r VM(s) is/are not protected by azure backup
The time to take effect w'ill be more than 20min.
Note that you can verify the Azure backup policy ...