Unfortunately, you cannot make changes to a post after it has been shared by one of your brand ambassadors in Apostle. Only the person who shared the post has the ability to edit or delete it on the respective social media platform, whether it's a personal account or a business page.
This is how it works:
Go to the post on - for example - LinkedIn
Select the three dots in the upper right corner
Select Edit post or Delete post
Please note: deleting a post will make it impossible for ambassadors, who have not shared the post yet, to share the post. They will see a message that the post has been removed if they try.