In Salesforce I have a lookup from Account to User representing the service lead for an Account. I want to sync the User object through that lookup relationship into Marketo. I have provided all the necessary permissions for our sync/integration user, but the field and object doesn't show up under "Salesforce Object Sync" after syncing the schema. I can see the permissions are in good shape, but I suspect there is a limitation in Marketo that doesn't allow you to sync the User object through the Salesforce Object Sync. Is that correct?