If a colleague unsubscribes from a notification email sent from an automation, you can easily resubscribe them. To do so, follow these steps:
1. From the Automation Builder, click the "Notify someone" action.
2. The "Notify someone" action will open. Click the email address that is unsubscribed.
3. Click the "Resubscribe Them" button.
4. Click "OK" to save your changes.
This resubscribe action will only apply to the notification you are updating. This action will not resubscribe an email address to any other notification sent from an automation.