An Outlook user reports the following bug in Outlook 2010 against Exchange server (any version).
"I am using Outlook 2010. When I delete an occurrence of an item from a public folder calendar, the entire series is removed.The steps I follow to reproduce this are: right click on calendar item, select delete, then select delete occurrence. When I open the occurrence and then select delete and delete this occurrence, then the item deletes correctly.This behavior only happens on the public calendar. If I do this on my personal calendar, it works fine."
The user who reported this has an Exchange 2003 account and I repro'd it against Exchange 2007 and Exchange 2010. Work around: open the recurring item when you want to delete an occurrence.
Yeah this is dumb though, we use outlook as our schedule at a major attraction, i need to bulk delete occurrences and quickly.