Our Salesforce account has a good amount of old leads (40k+) that we don't want to have transfer over into our Marketo account. When the Marketo sync is enabled though, those leads are automatically sent over from Salesforce into our Marketo account and we have to pause the sync and delete those old leads. We want our information syncing between the two systems, but if someone is an old account in Salesforce then we don't want them to transfer over. Is there a way to block that from happening, and if so how?
I think the answer here is probably possible, but I'm not sure how to go about accomplishing that. Any help would be greatly appreciated!