Might be that the client's OST file is corrupt. I think I would try
deleting all *.ost files on the client's hard-drive.
Close Outlook
Perform a FIND (click on desktop and press <F3>)
(If you are using XP or W2K operating system be
sure to look in hidden files)
Look for *.OST files.
Delete all that you find from the find window.
Restart Outlook.
When you restart Outlook it will rebuild a fresh new
ost file. Depending on how much information the client
keeps in their mailbox this can cause the first opening
to take longer than normal.

Signature
Nikki Peterson [MVP - Outlook]
Hi,
thanks for your quick response! I just walked over to the
user's workstation and tried it. Unfortunately it didn't
solve the problem, but I learned something new! Thanks! Do
you, or someone else, have any other ideas?
Fredrik
>-----Original Message-----
>have you tried opening outlook using the /cleanreminders
switch?
Guide)
>Outlook Tips: http://www.outlook-tips.net/
>Outlook & Exchange Solutions Center:
http://www.slipstick.com
>> Hi,
>>
>> Has anyone experienced the following. One of my user's
has
>> got an appointment in his calendar, however when the
>> mailbox is accessed from an Outlook 2003 client
configured
>> to use cached mode is doesn't show up.
>>
[quoted text clipped - 3 lines]
>>
>> I have pressed F9 to manually synchronize the cached
mode
>> clients, but the appointment still doesn't show up. Does
>> anyone have any idea on how to troubleshoot this?
[quoted text clipped - 3 lines]
>
>.