How to Remove Addresses from the Entourage Address Cache - support.microsoft.com
I haven't found much worth posting lately but this one has been a thorn in my side for some time. I find it equally as interesting that you need to jump through so many hoops in Entourage when the same issue in Outlook can be solved with one or two clicks. I hope some people find this helpful.
How to Remove Addresses from the Entourage Address Cache
Entourage provides an address cache feature that allows you to pick frequently used addresses from a list as you type in one of the recipient fields. This cache contains all of the addresses from messages that you send and receive.