Are you receiving bounced messages when trying to send email that look similar to this?
Delivery has failed to these recipients or distribution lists:
ex:/O=SAM HOUSTON STATE UNIVERSITY/OU=WNTAP3/CN=RECIPIENTS/CN=USERNAME
The recipient’s e-mail address was not found in the recipient’s e-mail system. Microsoft Exchange will not try to redeliver this message for you. Please check the e-mail address and try resending this message, or provide the following diagnostic text to your system administrator.
Here is what you will need to do:
1. Close Microsoft Outlook.
2. Open Window Explorer (Right-click on Start, select Explore OR hit the Windows + E keys)
3. Navigate to the Outlook folder in your profile: C:\WINNT\profiles\your_username\Application Data\Microsoft\Outlook
4. Delete the .nk2 file that is listed there.
5. Contact the Helpdesk at x4-1950 if you need assistance or have trouble with this process.
CLARIFICATION: This will remove ALL cached email addresses that you have stored in Outlook. If there are addresses that are not currently in your Address Book or Contacts you will need to save those before following the directions above.