I’ve replaced “other” best of breed credit management systems.  The key for adoption is to create a lobby or similar that replaces the view you would see in the best of breed.  Per my experience a  lobby that would show everything you want to see about a customer all at the same time. Similar to customer 360 but focusing on credit perspective including the most recent credit notes.  

But also a lobby that may look like the credit overview screen showing multiple customers at the same time.    

It takes a bit to get the users to buy into a new solution. The lobby can help a great deal.