Please review instructions here to get started with setting up an Assets import configuration. You can then access OnLink app from the “Manage your apps” menu to further configure and set the field level mapping. Here’s an example configuration:
Set a descriptive name for this map
Set source system to Azure AD
Asset Schema is pre-filled. This is the schema in JSM Assets on which you started the configuration.
Select the Object Type within your schema.
Select schedule frequency
Attribute mapping - see below table for more details.