Is it possible to delete all the Marketo database and re-sync it w/CRM (Dynamics)?
If yes, would you please share any steps or documents describing the same.
Please note: This is a new instance and recently synced w/CRM only.
Yes, it is possible. remember you will loose all activity logs, but if the database is recent, the loss might not be that big.
Just go to "all leads", select all and run a "delete lead" flow step.
Then go back to the CFM and update all records:
Support can probably help you too, both wit the database erase and the "force sync".