I've setup an Azure Backup vault some time ago and made backups of my systems to it. The backup vault is of type 'Backup vault (classic)'
Now there is a new kind of Azure Backup vault that enables alert among other options. I need to make use of that options.
How can I migrate the classic vault (which contains a lot of historical information) to the new vault type (Recovery Services Vault)?
I cannot find any option in the portal, nor can I find a Powershell script to execute the migration.
Unfournately, it's not possible to do that.
Can I migrate a Backup vault to a Recovery Services vault?
Unfortunately no, at this time you can't migrate the contents of a Backup vault to a Recovery Services vault. We are working on adding this functionality, but it is not currently available.
https://learn.microsoft.com/en-us/azure/backup/backup-azure-backup-faq
It's better wait for a while.