Azure SQL Backups - Are FULL, Differential and Transaction Log Using DPM Behind the Scenes?

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Azure SQL Backups - Are FULL, Differential and Transaction Log Using DPM Behind the Scenes?

We are being told that Azure SQL Backups, even though documentations indicates FULL, Differential and Transaction Log, are really leveraging DPM behind the scenes.  Is this true?  We can find no documentation supporting this statement.
Thank

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