As you start to type into the To, Cc, or Bcc fields in Outlook, the AutoComplete feature automatically displays email addresses from the address book. Unfortunately, AutoComplete may sometimes stop working. If Outlook doesn’t bring contacts up from the address book when you compose a new email, follow the steps below to solve the problem.

Enable AutoComplete

Check if AutoComplete is turned on. Reset the option and check if you notice any improvements.

  1. Launch Outlook.
  2. Click on the File menu.
  3. Go to Options.
  4. Then, select the Mail tab.
  5. Scroll down to Send messages.
  6. Locate the option that says Use Auto-Complete List to suggest names when typing in the To, Cc, and Bcc lines.


  7.  If the checkbox is not ticked, tick it to enable the option.

  8.  If the feature is already on, disable it and exit Outlook.

  9.  Wait for 30 seconds, restart Outlook, and re-enable AutoComplete.