Outlook 2007 – Calendar/scheduling issue.

My workplace just upgraded to Exchange and Outlook 2007 as the client.
One of my enduser’s has an issue with scheduling on calendars.

She says she gets this error message “Suggestions are not provided
because most attendees are not available during your working hours.”

My first thought is that the attendees do not have their calendar setup
with their workweek and available time, so it’s not an error on her
machine nor is it an error on Outlook’s part.

Anyone have feedback or suggestions on this topic, as I would really
appreciate it, thanks in advance.