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Azure Backup
An Azure backup service that provides built-in management at scale.
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Hi karthik pandya
Welcome to Microsoft Q&A Forum, thank you for posting your query here!
Azure Backup supports backing up all the disks (operating system and data) in a VM together using the virtual machine backup solution. Now, using the selective disks backup and restore functionality, you can back up a subset of the data disks in a VM.
You cannot exclude the OS disk—only data disks can be excluded.
Please refer to MS doc
https://learn.microsoft.com/en-us/azure/backup/selective-disk-backup-restore
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