Scenario: A Citrix Administrator discovers that a high number of Desktop OS machines are displaying as `Unregistered.’ The administrator successfully logs in to
one of the affected Desktop OS machines as a domain user. All of the affected Desktop OS machines are on the same hosting infrastructure. Several Desktop OS
machines on the same hosting infrastructure have registered successfully. Users in the environment have NOT reported any issues.

Why are the Desktop OS machines displaying as ‘Unregistered’?

A.
The Broker service is NOT running on the Delivery Controllers.

B.
The Citrix License Server is NOT communicating over port 27000.

C.
The Desktop OS machines computer accounts have been deleted from Active Directory.

D.
The difference in the system date and time settings on the Desktop OS machines and the Delivery Controller is greater than 5 minutes.