Issue
When troubleshooting MS Dynamics sync issues, it is often useful to know the GUIDs of the leads and/or contacts you are troubleshooting. Unfortunately, the GUID is not visible in Marketo by default.
Solution
If you would like to sync this information, add the field "Lead" on the Lead entity and "Contact" on the Contact entity to your synced fields. These fields natively pull the GUID of the record.