After receiving a replacement smartphone. a corporate user is able to open some emails but is unable to open encrypted emails.
Which of the following troubleshooting steps should a technician take NEXT?
A . Place the previous certificate in escrow.
B . Verity the installation of S/MIME on the phone
C . Ensure the users public Key is in the global address list
D . Instruct the user to wait for synchronization to complete.