Having trouble discovering a remote Presentation Server 4.5? 9 March, 2008
Posted by Melvin Porter in Citrix, XenApp/Presentation Server.Tags: Citrix, DCOM, Event ID 10006, Presentation Server, XenApp
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Is this the error you are getting ?
“Error: Errors occurred when using “Servername” in the discovery process“
Event ID 10006 with a source of DCOM appears with the following description: DCOM got error: “The component or the application containing component has been disabled…”

The Citrix knowledge base article explains as as follows…
The Access Management Console in Citrix Presentation Server 4.5 leverages MFCOM and CPSCOM interfaces. In order to use a remote Presentation Server in the Access Management Console discovery process, the remote Presentation Server must be enabled for network COM+ access. If the remote Presentation Server is not running Internet Information Services (IIS), then typically network COM+ access is not enabled.
Solution: It can be fixed in one of two ways. Either enable the Network COM+ access via Add/Remove WIndows Components or edit the Registry.
Find the complete solution here: http://support.citrix.com/article/CTX112853