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Event ID: 597 Source: Security

Source
Description
Recovery of data protection master key.
Key Identifier: <value>
Recovery Reason: <value>
Recovery Server: <value>
Recovery Key ID: <value>
Failure Reason: <value>.
Comments
 
As per Microsoft: "A key that is used by the Data Protection application programming interface (DPAPI) is being recovered. Because the DPAPI keys are backed up on Active Directory, the computer can automatically recover a key when necessary. This message is logged for informational purposes only. It usually follows a Security 596 message, which indicates that the DPAPI key was backed up. There may be a period of days or weeks between the messages". See MSW2KDB for more details.

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