How To: Map the Azure Information Protection Label.
To map the Azure Information Protection Label for the items/documents, the "ProtectionTemplateID" metadata field should be mapped as constant mapping and providing the AIP Label id value in it.
For the column to be enabled in all the content types, there is configuration key as given below:
<add key="SharePoint.ApplyInformationProtection" value="true"/>
Please note that the configuration file is located in Proventeq Migration Accelerator
(typically C:\Program Files \Proventeq\Proventeq Migration Accelerator)
To configure the Azure Information Protection Label, please refer to the link.