A security engineer is configuring Microsoft Purview to automatically apply sensitivity labels to Azure OpenAI-generated reports stored in SharePoint Online. The reports contain financial forecasts. The engineer creates an auto-labeling policy with a trainable classifier for financial reports. The policy has been active for 14 days but no labels have been applied. What is the most likely reason?

B is correct because Microsoft Purview auto-labeling policies for SharePoint and OneDrive start in 'Simulation mode' by default. In simulation mode, the policy identifies what would be labeled without actually applying labels. After reviewing the simulation results, administrators must turn the policy 'On' (active mode) to begin applying labels. If the engineer did not activate the policy after simulation, labels will not be applied even after 14 days. A is incorrect because trainable classifiers have training data requirements during the creation/training phase, not a minimum sample requirement before auto-labeling policies can use them. C is incorrect because while sensitivity label auto-labeling does require appropriate licensing, the most common cause of no labels being applied is simulation mode still being active. D is incorrect because SharePoint sites do not need to be registered in Purview Data Map for auto-labeling policies to apply sensitivity labels to SharePoint content.