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Overview
This guide will walk through the steps of removing auto-complete entries from your Outlook client. This may be needed if your auto-complete entry is currently linked to an expired e-mail account or address
A common example of when this may be needed occurs when a guest account is removed from the System Administration O365 site, but your auto-complete still points to @sunysysadmin.onmicrosoft.com address for routing rather than the direct e-mail address of the individual.
Guide
Removing Specific Entries
1. First, open a new email.
2. Start typing the email address you want send to, update, or remove.
3. When the suggestion appears, hover over it with your mouse, if you see multiple entries, be sure the one you wish to remove is highlighted (you may need to use the up and down arrow keys)
4. Click on the X next to the entry, or press the Delete key on your keyboard to remove the entry.
5. Type in the full correct/updated address of the recipient. i.e. john.doe@somecompany.com and send an e-mail to the recipient. This is important to establish a new auto-complete entry and avoid any potential future issues such as bounced e-mails. It is highly recommended to type out the address rather than selecting it from contacts or the address book.
6. Once the above steps are completed, you can resume use of the auto-complete entry as it will have been updated to the new e-mail address.