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Title: How To: Remove Cached Email Addresses from Outlook
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Audience: Staff / Faculty
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Applies to: Outlook Client
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Category: Communication and Collaboration
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Prerequisites: Access to Outlook
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Problem: Emails are "undeliverable", incorrect Emails addresses
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Description / Summary: Guide on removing cached Email addresses in Outlook that cause "undeliverable" message
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If within Outlook you send an email to an internal email address that you know is valid and get a “undeliverable” message back, you will need to follow these steps:
1. From a new message window in Outlook, begin typing the email address or name of the intended recipient. A drop-down window will appear that is attempting to guess the address that you are looking for.
2. Use the “X” beside the name to remove this entry
![](data:image/png;base64,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)
4. You should then be able to type the address of recipient and the correct address should auto-populate in the field
5. With a successful email sent, the correct address should now be cached within your Outlook