Exam 220-1102 topic 1 question 120 discussion

D. The most likely cause of the issue of users being unable to log in after a Group Policy setting was applied to all the workstations in the network is that the workstations and the authentication server have a system clock difference. This is because, when the Group Policy setting was applied it forced the workstations to use a specific SNTP server, which may not be in sync with the authentication server. This can cause issues with domain authentication as the server may not recognize the login attempts because the timestamps are not in sync. A. The SNTP server being offline may cause issues with time syncing, but it would not cause issues with domain authentication. B. A user changing the time zone on a local machine may cause issues with time syncing, but it would not cause issues with domain authentication. C. The Group Policy setting disrupting domain authentication on the system is a possible cause, but it is less likely than the system clock difference.

This question was exactly like that in my test that I passed today. If you study from here you have 85% to pass the test. D is the answer

The Group Policy setting that forced the workstations to use a specific SNTP server is the most likely cause of the issue where users are unable to log in now. The reason for this is that time synchronization is critical in Active Directory domains, and if the SNTP server is not accessible or incorrect, domain authentication will fail. Therefore, the Group Policy setting has disrupted domain authentication on the system. The issue can be resolved by either removing the Group Policy setting or ensuring that the SNTP server is accessible and correct.