Hubspot Leads not syncing into Dynamics 365

[JLilley]

I have used the Hubspot sync to set up a Leads sync from Hubspot to D365, based on list membership.  I have 3 Leads in the list in Hubspot, and none of them are pushing through into Dynamics.
They all have email addresses, 2 have a Lifecycle Stage of Lead and 1 has Subscriber.
Can anyone help me work out why they are not syncing?  Is there an error log or similar that I can view to get some clues?
Thanks in advance.

[jbogaert · Accepted solution]

Hi @JLilley, I've asked one of our experts to take a look at it, and this is what they found:

Our assumption is that "parentcontactid" is some kind of required field in HubSpot. Since that field isn't mapped, the creation of the contact is rendered invalid.

Hope this helps!