Can you check if it's a limit or if there's a problem with those names?
Make a Group Schedule of the missing names and see if it works.

 Judy Gleeson [MVP Outlook]
 Acorn Training and Consulting
 www.acorntraining.com.au

 Everyone - turn on your Advanced Toolbars and learn how to use the Field
Chooser and Group by Box!!

 > We are having trouble viewing calendar details for 500 users at a time
 > in outlook 2003.
 >
 > Before (when we used Outlook XP) our reception used the "View Group
 > Schedule" to see the calendar details for all the employees in the
 > company at once.
 >
 > Now we have updated to Outlook 2003, and for some reason it only shows
 > calendar details for the first 280 users or so...
 > (We can still se Free/Busy information for the rest, but no calender
 > details).
 >
 > Can this limit be configured, or is there a way to bypass / work around
 > this ?
 >
 >
 > B.R.
 > Jan Petersen
 >