Change the ConfigurationMode parameter to a mode such as ApplyAndMonitor or ApplyAndAutoCorrect is the correct option.

The ConfigurationMode parameter determines how the node's Local Configuration Manager behaves after you register the node. Choosing ApplyAndMonitor enables reporting and monitoring of configuration drift and choosing ApplyAndAutoCorrect enables automatic remediation when drift is detected. Changing the registration so the node is not in ApplyOnly addresses the automation problem where configurations are applied but not monitored or corrected. Note that the cmdlet shown in the brief comes from the older AzureRM module which is deprecated and newer exams and guides use the Az equivalents.

Add the DefaultProfile parameter to the command is incorrect because DefaultProfile only sets which Azure subscription or context the cmdlet runs under and it does not change the Local Configuration Manager's behavior that controls monitoring or auto correction.

Swap Register-AzureRmAutomationDscNode for Register-AzureRmAutomationScheduledRunbook is incorrect because a scheduled runbook registration is used to associate runbooks with schedules and it does not register or configure DSC nodes or their LCM modes.

Include the AllowModuleOverwrite parameter on the registration command is incorrect because AllowModuleOverwrite relates to module import and update behavior and it does not affect a node's configuration mode or enable drift monitoring or automatic correction.

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