How do I reset the nickname and the automatic completion caches in Outlook? (NETIQKB52860)

goal
How do I reset the nickname and the automatic completion caches in Outlook?

goal
Why do the nickname and automatic completion caches in Outlook contain old information after mailbox migration?

fact
Exchange Migrator 2.x

symptom
The nickname and automatic completion caches have incorrect information.

cause
Although users' mailboxes have been migrated to a new server, the Outlook clients may still contain cache information for old e-mail addresses.

fix
This issue is non-Exchange Migrator related. Microsoft has published instructions for resolving this issue at the following Web site:

http://support.microsoft.com/?kbid=287623

Formerly known as NETIQKB52860