An employee is attempting to synchronize their contacts and calendar from their company-issued iPhone to their MacBook for easier access during business trips. They've successfully added their iCloud account on the MacBook, but only contacts have been synchronized, not the calendar entries. As an IT support specialist, what is the FIRST action you should take to ensure that calendar synchronization is successful?
Reinstall the operating system on the MacBook.
Verify that calendar synchronization is enabled in the iCloud settings on the MacBook.
Check the network connectivity on the MacBook to ensure it is connected to the internet.
Update the operating system of the MacBook to the latest version.
Advise the employee to manually export the calendar from the iPhone and import it to the MacBook.
Restart the MacBook to refresh the iCloud synchronization process.