Outlook 2010

[Ycguy1117]

For some reason lost all contacts . Nothing else but contacts

 

[neeyik]

Lots of web pages on this matter:

Restore or recover a deleted contact in Outlook - Microsoft Support

Learn how to recover deleted contacts in Outlook 2010, Outlook 2013, or Outlook 2016 for Windows. You can also recover contacts from a deleted subfolder.

support.office.com

How to Retrieve Deleted Contacts in Outlook Without Data Loss?

Retrieve deleted contacts in Outlook 2010 without any data loss. Explore this guide to restore deleted contact group in Microsoft Outlook.

www.systoolsgroup.com

What to do When Your Contacts are Missing in Outlook - Lookeen

If you just upgraded your Outlook version and find that your Outlook Contacts are missing from your Outlook Address book, don’t worry! You can fix it.

lookeen.com