The hosts on the network were recently subject to routine maintenance procedures. After these
procedures, all of the users are unable to access the cloud based EHR/EMR system. Which of the
following is the MOST likely cause of this scenario?

A.
Group policies were refreshed.

B.
Unsupported browser patch was installed.

C.
Server services on the domain controller were refreshed.

D.
Drives were defragmented.