Step 1:
Subscriptions can have their credit cards retried in bulk by visiting the "Subscriptions" index page.
Step 2:
So that all subscriptions aren't updated, filter the list based on your needed requirements. The most common filters for this would be
Subscription Status - Suspended and In Grace Period
Subscription Payment Type - Credit Card
Subscription Last Order Created Date - The date range of when the most recent order was created for the subscription.
Step 3:
Select Bulk Actions.
Step 4:
Select the subscriptions to retry and select the action.
Step 5:
Confirm to initiate retrying of subscription credit cards.