Hyper-V Access Denied Error


  • Hi

    We I have several Hyper-V 3.0 servers and am trying to manage the virtual machines using Hyper-V Manager on my Windows 8 Pro workstation

    When I try to connect to a Hyper-V server I get the error message "Access Denied.  Unable to establish communication between <host> and <client>"

    There are plenty of posts on TechNet and otherwise explaining how to fix this by editing Access Permissions of the Anonymous Logon via Component Services.  I have done this and am still getting the error message.

    Additionally I have seen some posts saying to flush the DNS on client & host but this also has not worked for me.

    Does anybody have any other suggestions on how to resolve this error?

    Many thanks

    Wednesday, August 28, 2013 8:47 AM


All replies

  • Are they joined to the same domain?

    Is your user account in the Hyper-V Administrators security group on the Hyper-V Server?

    Is remote administration turned on?  (I assume you did this using sconfig, but still need to ask)

    Is this Server 2012 with Hyper-V or Hyper-V Server 2012?

    Brian Ehlert
    Learn. Apply. Repeat.
    Disclaimer: Attempting change is of your own free will.

    Wednesday, August 28, 2013 3:04 PM
  • They are joined to the same domain

    My account is not in HV Administrators but this is by design as I have made a "Power Users" role in Authorisation Manager.

    Remote Admin is turned on.  I can manage this host from a Windows 2008R2 box using the same user account so the problem seems to possibly be pointing at the Windows 8 workstation.

    The virtual host is running Server 2012 DataCenter with the Hyper-V Role installed.

    Many thanks

    Wednesday, August 28, 2013 8:35 PM
  • did you turn the firewall off on the vhost server and the within the VM?? if this works your need to configure your firewall setting or just leave them off. Could also be the firewall on the windows 8 PC as well.  Most obvious place I would look at. visit my blog

    Wednesday, August 28, 2013 8:47 PM
  • I have tried turning the firewall off on both client & server but still cannot access the virtual machines on that host

    Many thanks

    Wednesday, August 28, 2013 8:57 PM
  • Did you create a custom Hyper-V rule set in Authorization Manager?

    These have not changed:

    And there is the brilliant hvremote tool by John Howard:

    Which does the messy bit for you.

    Brian Ehlert
    Learn. Apply. Repeat.
    Disclaimer: Attempting change is of your own free will.

    Wednesday, August 28, 2013 9:16 PM
  • Thanks very much, that hvremote tool is super useful!!
    Thursday, August 29, 2013 8:46 AM
  • It's not clear to me at all if your issue was corrected and if so what it is that you did to correct it. Could you include the steps that you took to fix the problem?

    Friday, September 12, 2014 4:04 PM
  • Hi

    This was over a year ago so my memory is a little rusty but I believe after spending a significant amount of time trying to get certain user groups having certain access rights I became impatient and just added users to "Hyper-V Administrators" group.

    As far as I understand the problem is related to permissions rather than communicating with a Hyper-V node.

    The security problem was then rectified permanently when we put Virtual Machine Manager in (which has support for security groups) - regular users accessed VMs via the VMM Console.

    Sunday, September 14, 2014 9:59 PM