08-13-2013 07:33 PM
Hello rinkesh and welcome to the BlackBerry Support Community Forums.
Sorry to hear you're having difficulty syncing your Contacts with your Outlook.
What is your Outlook version? What software version does your 8520 Curve have installed?
To clarify, you have contacts on your BlackBerry which are not updating into Outlook? If this is accurate, in your Contacts>Menu>Options do you have more than one contact list displayed? If so, what are the contact lists?