SHA-2 based digital certificates do not work.
Operating system version
Windows Server 2012 R2
Description of the issue
SHA-1 has been deprecated from its use in digital certificates by Microsoft, Google and Mozilla who collectively develop and maintain the majority of Web browsers that are in use worldwide.
This is because they believe it to be insecure. Going forward, CAs will issue SHA-2 based certificates by default and will soon no longer issue SHA-1 based certificates at all.
SHA-2 is the replacement and FileMaker needs to support this to interoperate with the modern secure Web.
For background information on why this is needed and why it must be treated as a bug and blocking issue, see:
Steps to reproduce the problem
Attempt to install a SHA-2 (SHA-256) based certificate in to FileMaker 13 from one of the major CAs.
It should be possible to install and use a SHA-2 based certificate in to FileMaker from one of the major CAs.
It is not possible to install and use a SHA-2 based certificate in to FileMaker from one of the major CAs.