Jonny Dyer:Thank you for the post.First, Windows Server 2012 R2 was never tested for FileMaker Server 13, but Windows Server 2012 Standard:Additionally, we have seen the issue described if other third party security or antivirus software is installed.Any third party software, security, or antivirus installed on this computer?Any applications besides the operating system, FileMaker Server 13.0v4, and the components installed by FileMaker Server 13?TSFalconFileMaker, Inc.
Thanks for the reply. I've been talking to FMP UK - and we've ascertained that WSUS was getting in the way of admin-console.
Since disabling WSUS and re-installing FMP Server, admin-console on local server (accessed by remote desktop) is working brilliantly.
Remote admin-console from web-browser is still poor however. I don't have any third party software, security or antivirus that I am aware of (just getting netstats/tasklist/events etc to check).
Just double checked, and remote-admin-console from s neighbouring server (the worker server) on the same array and therefore within the DMZ etc is also slow - so it must be something on the Master Machine.