Nutanix Certified Professional - End User Computing (NCP-EUC) 6.10 Exam NCP-EUC Question # 9 Topic 1 Discussion
NCP-EUC Exam Topic 1 Question 9 Discussion:
Question #: 9
Topic #: 1
An administrator attempts to create a Machine Catalog for Windows 11 desktops in Citrix utilizing Machine Creation Services (MCS), but the desktops fail to register on startup.
For a Citrix VDA (Virtual Delivery Agent) to successfully register with the Delivery Controller, it must establish a secure communication channel which relies heavily on Kerberos authentication.
A common cause for registration failure on startup, particularly in new deployments or non-persistent environments, is that the Time is off on the machines. If the system clock of the virtual desktop drifts more than 5 minutes from the domain controller or the Delivery Controller, Kerberos ticket generation fails. This prevents the VDA from authenticating with the Broker Service, resulting in a "Unregistered" state in Citrix Studio. While Windows 11 has strict hardware requirements (Option A), failing to meet those usually prevents the OS from booting or installing entirely; if the OS boots but fails to register, time synchronization is the most probable infrastructure cause.
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