A user in the IBM SmartCloud Notes service adds an on-premises user into a calendar
meeting invitation. When the chair checks the schedule for freetime slots, the client reports
that freetime is unavailable for the invitee. Which option is the most likely cause of this
problem?

A.
The IBM Lotus Notes client of the meeting chair cannot connect to the on-premises mail
server of the invitee.

B.
The Calendar Connector task is not running on the mail-routing hub server.

C.
The on-premises mail server is not running IBM Lotus Domino 8.5.1 Fix Pack 2 or later.

D.
The SmartCloud Notes mail server of the chair cannot connect to the on-premises mail
server of the invitee.