[Known issue] Outlook contacts disappeared or not showing

This article describes a known issue where your Outlook contacts disappeared in New Outlook or Classic Outlook 365.

Outlook contacts not showing – What is the issue?

There are several reports on Reddit and on Microsoft Learn about contacts suddenly disappearing from Classic Outlook. There are some reports for New Outlook too, with the same issue, but most of the cases correspond to Classic Outlook

Outlook contacts not showing is a known issue

Fortunately, your contacts are not lost – simply the Outlook contacts disappeared. You should see your contacts on Outlook for Web here:

People – Outlook

In other words, this is just a visibility issue. If you try to Export the contacts using the export button, it should give you a full CSV file.

Microsoft says a fix is rolling out soon for the Outlook contacts visiblity issue

Sidenote: If you are migrating from Outlook Classic to Outlook new

Switched from classic Outlook to the new Outlook app? Here’s what you need to know about your data. Only contacts and calendars tied to Outlook.com or Microsoft 365 accounts are automatically carried over to the new experience. If your contacts or calendar events were stored under a POP or IMAP account, they don’t migrate automatically — you’ll need to manually export them from classic Outlook and then import them into the new app.

Also read if your Outlook account was hacked:

Easily fix Outlook hacked Draft Email keeps reappearing

To summarize, this guide would help you access your contacts in Outlook New if they disappeared all of a sudden, by using OWA app since it is a known issue.