Hi, Is there any option to check the user name who has enabled the sync for the particular field in Marketo. I have checked in Audit trail but don't see the option related to Field Management.
Are you referring to a Marketo field only? or are you referencing a field created in your CRM which is now synced into Marketo?
For Marketo only fields, you can try to reach out to support to see if they can provide you with that information.
If the field was synced (as you described it) into Marketo, I would reach out to your CRM team and see if they can assist you with that information.