I have a Microsoft Lumia 520. I have lost the contacts and do not remember the userID associated.
Is there any to recover the contacts?
How to recover contacts when UserID is forgotten?
You cannot recover your contacts without knowing the user ID. However you can recover your user ID.
To recover your User ID
If you have a phone number associated with your email account you don't need a user ID. You can log into your account on Outlook mail.com using your phone number. After loging in note your username from there.