1Y0-400 · Question #205
A Citrix Administrator is unable to create desktop OS machines using Machine Creation Services. What is a possible cause of the issue?
The correct answer is C. The Machine Identity Service is NOT running. Exam Questions, Study Guides, Practice Tests. Lead the way to help you pass any IT Certification exams, 100% Pass Guaranteed or Full Refund. Especially Cisco, CompTIA, Citrix, EMC, HP, Oracle, VMware, Juniper, Check Point, LPI, Nortel, EXIN and so on. Our Slogan: First Test…
Question
A Citrix Administrator is unable to create desktop OS machines using Machine Creation Services. What is a possible cause of the issue?
Options
- ACitrix Director is unreachable.
- BDHCP is NOT working correctly.
- CThe Machine Identity Service is NOT running.
- DAntivirus software on the Delivery Controller is blocking the creation.
How the community answered
(25 responses)- A12% (3)
- B8% (2)
- C76% (19)
- D4% (1)
Explanation
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Topics
Community Discussion
10
Luis F.May 7, 2026C is the one. The Machine Identity Service handles identity provisioning for MCS-created machines, so if it is not running, the Delivery Controller simply cannot complete the machine creation process and the whole thing stalls out.
Lena V.Jun 9, 2026C is your answer. Machine Creation Services depends on the Machine Identity Service to generate and assign machine accounts in Active Directory during provisioning, so if that service is down, MCS cannot complete the desktop OS machine creation process.
Grace U.Jun 27, 2026B is the sneaky one here because your brain naturally jumps to networking when provisioning fails, but DHCP problems surface after a machine already exists and needs an address, not during the creation step itself. The Machine Identity Service is what MCS actually calls on to generate and register those computer accounts in Active Directory, so if that service is down, the whole provisioning process stalls right there, which makes C the right pick.
Isolde G.May 10, 2026Honestly my first instinct was B, because broken DHCP will absolutely wreck provisioning workflows and I have seen it burn people in the field more than once. But then I thought about what MCS actually needs at the control plane level to stamp out new machine accounts in Active Directory, and that pulled me back to C. The Machine Identity Service is what handles domain computer account creation during provisioning, so if it is stopped or crashed on the Delivery Controller, MCS cannot complete the catalog build regardless of network health. Director being unreachable (A) affects monitoring only, and antivirus (D) is a real nuisance but too vague to be the primary cause the exam is testing here.
Giselle K.May 13, 2026Solid read on C, but worth flagging that the Citrix Broker Service dependency chain matters here too, since MIS failing will often cascade a Broker Service fault that surfaces in Studio as a generic catalog error and throws people off the real root cause.
Ingrid P.May 13, 2026Machine Identity Service handles the computer accounts MCS needs, right, so without it nothing gets provisioned?
Mei-Ling H.Jun 24, 2026I pick A and here is my thinking. Citrix Director is the main monitoring and management console, so if it is unreachable the administrator literally cannot see or interact with the machine catalog workflow, which means the creation process appears to fail from the admin side even if something is technically running in the background. The question says the admin "is unable to create," which points to an access or visibility problem on the management plane, not a low-level network or service issue. DHCP not working would cause machines to fail after they are provisioned, not block creation itself, so B does not match the timing the question describes. I keep coming back to A because the admin experience of "unable to create" fits best with the console being unreachable.
Grace U.Jun 25, 2026Mei-Ling, your instinct about the admin experience is actually sound, but the piece to reconsider is what sits between Studio and the machines being built. Director is a read-only monitoring tool, so losing it never blocks the creation workflow itself. Option C points to the Delivery Controller service being unavailable, which is the component that actually drives machine catalog creation, so when it is down the admin cannot initiate or complete that process at all, which matches the scenario exactly.
Giselle K.May 18, 2026Antivirus blocking MCS catalog creation on the DC is a classic gotcha, go with D.
Ingrid P.May 19, 2026Giselle, antivirus is a solid trap answer but the question is really testing provisioning permissions, and C covers the missing "Create Computer Objects" right in the OU where MCS needs to stamp out machine accounts. D would matter if catalog creation finished but scans were blocking files, which is a different failure point entirely.