Add entries to the AutoComplete list

Outlook 2016
The AutoComplete list is updated automatically after sending an email (see more about AutoComplete feature). To make it easier to work in Outlook, you can add useful email addresses to your AutoComplete list without sending emails.

To add addresses to the AutoComplete list without sending an email to the recipient, do the following:

   1.   On the Send / Receive tab, in the References group, click the Work Offline button:

Work Offline button in Outlook 365   or   Work Offline button in Outlook 365

Outlook displays the Working Offline status in the status bar and stops sending and receiving messages:

Offline in status bar Outlook 365

   2.   Create messages to all recipients you need to add to the AutoComplete list and send them.

Notes: The AutoComplete list is limited to 1 000 entries for Outlook 365. After reaching this limit, Outlook removes the entries you use the least to make room for new entries.

Outlook places all sending messages in the Outbox folder:

Messages in Outbox Outlook 365

Now, you have all added recipients in the AutoComplete list:

AutoComplete list in Outlook 365

   3.   Delete all messages from the Outbox folder to avoid sending them.

   4.   On the Send / Receive tab, in the References group, click again the Work Offline button to switch into the online mode.

If you have any questions or suggestions, please feel free to ask OfficeToolTips team.