If you already have a Stripe processor setup, go to the company menu and click on Payment Processors then Edit next to Stripe. Once you're on the edit screen, you'll notice a new set of options that allow you to select the time frame to sync payment methods.
Upon selecting the dates and syncing, the system will contac Stripe and start to copy over all CRM profiles from Stripe that were created during this time frame and have a payment method on file. Upon successful syncing, you'll notice the card on file will be available on their member profile. Please note that syncing can take some time as it runs in the background.
Please note that cards may not attach directly to the subscription, this will happen at the next billing cycle.