How do I backup my phone contacts?
Basically, the outlook contacts are typically found within the user's profile directory and are stored in a file called Outlook. pst on your computer; look for a file with a . oab extension which represents the Outlook Address Book and contains all the contacts.
How do I backup my email contacts?
Are my contacts saved in the cloud?
Where are Outlook contacts stored in Windows 10?
Should I save contacts to phone or SIM?