FileMaker Server should officially support the use of certificates from AWS certificate manager. Given that more and more server instances are going to run on AWS in the form of FileMaker Cloud, it makes sense that it should support certificates from AWS as well.
Amazon also provides support for private certificates which would be useful for most filemaker server installs. Currently FileMaker Server admins have to jump through hoops to install a certificate on a server that is not public facing and never will be.
This should also support the managed certificate renewal supported by Amazon.