Howto enable/disable the Citrix Desktop Viewer Tab. (the black tab for user interaction in a session)

Here is a guide on how to enable the Citrix XenApp/XenDesktop Viewer Tab.

some more info about webinterface.conf

and a howto disable from Citrix


Note: There is no ‘Official support’ for CDViewer on XenApp






The task you are trying… ..Remote Desktop Services is currently busy…


Got this error on XenApp or Terminal Server / Remote Desktop Services ? have a look at.  KB2661332
Deadlock between the Client/Server Runtime Subsystem and  for example (not always) Microsoft Office 2010.