Datto Mac Agent: Critical backup failure: CURL Error: [URL]: 400



This article explains the origin of and solution for the Datto Mac Agent error:

Critical backup failure: CURL Error: 400

Cause and solution

This problem is caused by a conflict between the Datto Mac Agent and Apple FileVault. To have successful backups with the Datto Mac Agent, you must disable Apple FileVault. See this article from Apple: OS X Yosemite: Turn off FileVault encryption.

If you have already performed this step, contact Datto Technical Support for further assistance.


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