Names for customer facing function

What do you call your customer facing function - ie: the function your CCO leads?  I've heard Customer Success, Customers for Life, etc, but curious as to what you call it. The challenge we have is that our entire customer/post-sale function is called Customer Success and the team I lead (CSMs) is also called Customer Success. So to make things simpler, what is another name for the function comprised of CSMs, support, services, and training?