Continuing the discussion from Windows Server 2016 TP5 - Docker server remote management:
Can you repost this at https://social.msdn.microsoft.com/forums/en-us/home?forum=windowscontainers ?
This is the forum Microsoft set up for issues with Windows Server 2016 TP5 including containers. The maintainer for the microsoft/iis image is answering questions there, so hopefully they can get back to you quickly.
With that said, I think there’s a chance that restarting the Docker service could fix this.