Sudden change in Calendaring behaviour
 

I'm not sure which group will be able to answer this question.
We're on a Novell backend with Win XP Clients/Exchange 2003 SP1/ Outlook
2003 SP1.

Suddenly today, when I add an attendee to a meeting invite, I am no longer
getting the prompt "Only update added and deleted attendees or update all".
What happened? Does this have something to do with the way outlook
frequently logs changes in the dbase? Or possibly did my admin change
something in exchange that I am not aware of?

Also - has anyone experienced a problem with selecting the "Only send update
to added or deleted attendees", but ALL the attendees get the update anyway?
Why does Outlook or the Exchange server ignore a direct selection of a given
option?

Thanks,
-Monica