Just got onboarded and taking over our email program. We migrated from Hubspot approx 6 months ago and have not sent many emails to that audience since. When migrating to SFMC, instead of inserting those contacts as unsubscribed, they were inserted from our Saleforce lead side and they have a subscribed subscription status. There is a DE that contains those contacts that were unsubscribed from the old system, but ideally they should simply marked as unsubscribed in SFMC so they can resubscribe in the future if so desired (rather than suppressed for as long as possible).
Is there a way to either import subscription details into All Subscribers or create a query that updates All Subscribers based on that Data Extension?