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How to Enable or Disable AutoComplete List in Outlook 2016

Microsoft Outlook maintains an AutoComplete list that is used by both the automatic name-checking and automatic completion feature. Also known as the “nickname cache,” the AutoComplete list is generated when you send an email from Outlook. We have shown you how to disable and clear AutoComplete in earlier versions of Outlook. Now, here’s a look at how to do the same in the more modern versions – Outlook 2013 & 2016. We’ll take a look at deleting individual entries, too.

Outlook 2013 / 2016: Enable, Disable, or Empty AutoComplete

To access the AutoComplete setting head to File > Options and select the Mail tab in the left pane. Then scroll down to the Send Messages section and check or uncheck Use Auto-Complete List to suggest names when typing in the To, Cc, and Ccc lines. Also, note that from here you can manually clear the entire list by clicking the Empty Auto-Complete List button.

1 Outlook Options

Remove Individual AutoComplete List Entries

Outlook will keep 1,000 entries in the AutoComplete list at a time. Once your cache reaches that limit, Outlook uses an internal algorithm to determine the best names to remove. Essentially it will remove the entries you use the least. However, if you live in Outlook all day and have that many contacts, you might find a situation where some names are unexpectedly removed from the list.

delete individual entry

To proactively avoid that situation, Microsoft recommends the best practice is to remove entries that you no longer need. You can do this by removing them one at a time. To do that, launch Outlook and start a new email. Type the first few characters of the entry you want to remove into the To field. When the entry appears in the list of suggested contacts, click the X icon to remove the name or highlight it and hit the Delete key.

That’s all there is to it. If you have over 1,000 contacts in your AutoComplete list, and notice sometimes important contacts go missing, getting rid of the ones you no longer need will help keep your contacts organized.

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