Resource reservations created by an Exchange organizer through the CMN mail connector
are not migrated properly if the exception list containing Subject.
When a recurring meeting has an instance that doesn't follow the defined
recurrence rule, an exception attachment is added.
When MNE processes the recurrence rule for the meetings, it will check
the exception attachment for Subject, Location, AlarmSet among other fields.
If the instance's exception Subject line exists and is different from
the series Subject line, it will overwrite it with the exception Subject line.