With some Office 365 subscriptions, some of you may notice that the auto-complete feature is replaced by ” Recent people”.
What this means is, when you are composing an email in Outlook, when you go to the “To:” field it only shows the 5 Recent people you have emailed too, not all of the previous email addresses beginning with “A”
With older versions of Outlook prior to the updates, the Auto-complete should show all previous email recipients beginning with the letter you input (E.g. “A”).
To remove the Recent People bug, it requires a registry edit. Follow the below instructions to fix the issue.
Please note that the registry key name is : DisableAutoCompleteUpdate
Thanks to the following authors for providing this solution: