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This article was previously published under Q287623 On This Page SUMMARY MORE INFORMATION Fix it for me Let me fix it myself Outlook 2010 Method 1 Method 2 Outlook 2002 through Outlook 2007 Did this fix the problem? Expand all | Collapse all SUMMARY Microsoft Outlook maintains a nickname list that is used by both the automatic name checking and the automatic completion features. The nickname list is automatically generated as you use Outlook. If the nickname cache is corrupted, Outlook may not be able to identify recipients, may offer incorrect recipients when automatically completing the e-mail address, or may send the message to the wrong person. Unlike earlier versions of Outlook that store the nickname cache in a file on your hard drive, Outlook 2010 stores the nickname cache in your primary message store. For example, if you are using a Microsoft Exchange Server account, your nickname cache is stored in a hidden message in your mailbox. Back to the top MORE INFORMATION How to rem