Thank you for post!
I understand that you would like to know how to recover the data if you loss the data due to cyber-attack.
If your organization is compromise due to cyber-attack you can reach our Microsoft Incident Response team which works to respond to compromises and help customers become cyber-resilient.
For more information, please read Recovering from systemic identity compromise.
Also know about the Shared responsibility in the cloud.
Hope this helps. Do let us know if you any further queries by responding in the comments section.
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Akhilesh.
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