I am going to be purging my database from records that haven't been active for over a year. Currently, our Salesforce environment is not able to be synced with Marketo. Instead, we've been importing lists with Salesforce data into Marketo manually to ensure the data will still live in Marketo.
After I purge my database from inactive records, I don't want the same records to come back in and enter the database if they are on a list that is imported. Right now, I'm estimating around 14K inactive records will be purged. Is there a best practice for this?