Lost contacts after attempted import

[D Dopslaf]

I lost all of my outlook contacts after attempting to import a new .cvs file.
Now I am getting the following error "The messaging interface has returned
an unknown error. If the problem persists, restart Outlook." I have
restarted Outlook 3 times and have even rebooted my computer. No luck. I
attempted to import a recently backed up file of my contact and I can't even
restore the contacts. Help what do I do.

 

[Brian Tillman [MVP - Outlook]]

I lost all of my outlook contacts after attempting to import a new .cvs file.
Now I am getting the following error "The messaging interface has returned
an unknown error. If the problem persists, restart Outlook." I have
restarted Outlook 3 times and have even rebooted my computer. No luck. I
attempted to import a recently backed up file of my contact and I can't even
restore the contacts. Help what do I do.

CSV files are NOT, NOT, NOT! backups. Never use export/import to back up
Outlook. Just open the original PST, either within Outlook with
File>Open>Outlook Data File, or by connecting the PST to the mail profile with
the Mail applet in Control Panel.