If you’ve followed CTX127527 to install Citrix Desktop Studio onto a XenApp 6 server you may have found that this breaks your XenApp 6 Delivery Services Console.
This is due to the fact that, as part of CTX127527, you have to install CitrixGroupPolicyManagement_x**.msi and this deletes the MFCOM DCOM Component that is required by the XenApp 6 Delivery Services Console.
If you’ve come across this issue after having installed all the components you can fix it by running a repair of the XenApp 6 installation using Programs and Features.
Once you’ve done this both consoles should work on the same server.
If you haven’t already installed all the components listed in CTX127527 you can leave out CitrixGroupPolicyManagement_x**.msi and the console will work OK without it but you will not be able to manage XenDesktop 5.5 GPOs from the server.
When I tested installing all components on a XenApp 6.5 server I did not have any issues.