Windows 10: Contacts in Outlook

I don't know why but all of my contacts have disappeared. Any Ideas !!!!!!!!!!!!!!!!!!!!!

:)

 

Contacts in Lumia 950 missing, outlook contacts export gives an empty file

In my Outlook account all my contacts have for some reason been shifted to a new folder called "Other contacts" and the main Contact folder is empty. The thing is that if I add a new contact in the main folder it syncs with my phone, while although I can
see all of my contacts in the other folder I cannot move them or export them or sync them. Syncing my contacts with Gmail also transfers just the ones that are in the main folder.

 

Contacts in Lumia 950 missing, outlook contacts export gives an empty file

Today I noticed all of my contacts in People app on Lumia 950 are missing. All the text messages are still there. All the contacts are still available in web Outlook. I tried syncing them again but it doesn't work. Did a soft reset, but the issue persisted.

I tried exporting contacts from Outlook so I could import them to Gmail and sync them from there, but the export file only has the header and no contact names or phone numbers.

I was thinking about hard reset, but this seems to be an Outlook problem, so I'm guessing that's not gonna fix the issue. Any suggestions before I try?

***Moved from Outlook.com / People and contacts / Adding and managing contacts and groups***

 

Which Outlook: Outlook 2016 or previous, Outlook in Office 365, Outlook.com, Outlook Express? Big impact on the recommendation.

 

Pop mails, contacts, notes and calendars are all kept in .pst files. IMAP settings are stored in .ost file. Depending on your version and setup, these might be in different locations. If you can find your old pst you might be able to import to your current folders. When going between versions exporting and importing to a comma separated file seems to work well. When I upgraded to win10 I also bought Office 16. I have the programs on the SSD and keep my pst files and ost files on my HDD along with document, drivers, and some notes how I did it. Since my machine has an e-SATA connector, I back up the HDD monthly and store that elsewhere. Makes it easy to do a clean install and restore my machine. Remember clean SSD installs should be without any other drives or devices attached.