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HTTP based Health Check Probe functionality RRS feed

  • Question

  • I have been trying to implement the HTTP based Health Check Probe functionality as detailed in https://blogs.technet.microsoft.com/applicationproxyblog/2014/10/17/hardware-load-balancer-health-checks-and-web-application-proxy-ad-fs-2012-r2/.

    I have tested this a two different ADFS implementation and if I use a web browser and browse to http://<ADFS server name>/adfs/probe or http://<ADFS IP Address>/adfs/probe I get a "HTTP Error 503. The service is unavailable" where I'm expecting to get a 200. Port 80 is open on the ADFS servers and I've also run Windows Update to patch the servers to the latest fixes. I cannot see /adfs/probe as an endpoint in ADFS Management.

    Does anyone have any ideas why it looks like the HTTP based Health Check Probe functionality seems to be missing from my ADFS servers?

    Has anyone got this working?

    Tuesday, September 6, 2016 10:23 PM

All replies

  • As long as https://support.microsoft.com/en-us/kb/2975719 is installed, you should be fine.

    By the way, what load balancer technologie are you using to require this probing URL to be available? Many of the big one on the market have came up with a SNI compatible probing.


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    Wednesday, September 7, 2016 12:00 AM
  • I have run Windows Update to all all the latest fixes and roll-ups. I cannot see 2975719 and I cannot install it as it says it is not applicable to my system so I guess it has been superseded.
    Thursday, September 8, 2016 10:46 AM
  • This could also mean that you have a pre-requisite missing (unlikely though since you're hooked to Windows Update...) just to be on the safe side, what version of C:\Windows\ADFS\Microsoft.IdentityServer.ServiceHost.exe? I have 6.3.9600.17238.

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    Thursday, September 8, 2016 12:50 PM
  • I think that I have solved it. Even though I have run Windows Update and it says everything is up to date, I'm still having to install fixes 2919442, 2919355 and 2975719 manually. I cannot understand why this should be the case. I'm just installing these manually but 2919335 is very large and takes a long time to install, but I'm assuming once I have these installed all will be good.
    Thursday, September 8, 2016 2:09 PM
  • Any update?

    Note: Posts are provided “AS IS” without warranty of any kind, either expressed or implied, including but not limited to the implied warranties of merchantability and/or fitness for a particular purpose.

    Tuesday, September 13, 2016 3:38 PM