Contacts in MS Outlook are the list of people from your address book. This is similar to electronic Rolodex; Outlook keeps track of phone numbers, email addresses and much more vital information in contact, contacts can store more information about a person than address book. Microsoft Outlook lets you store this valuable contact details and other items by archiving in a personal information folder called as PST. So any corruption to this PST file will result in loss of contacts and other items from MS Outlook.
The answer to this question is from the backup copy of your Outlook PST file which you had created. Restoring emails, contacts, calendars and other items to your new Outlook is a very easy procedure if you have a backup. If you don't have a backup. Then, try the specialized Outlook recovery software, such as Yodot Outlook Repair PST.
Open MS outlook and follow the below procedure:
Usually everything goes fine when following the PST import wizard, but sometimes in the final stage of the wizard, the import wizard returns an error message: “PST file access error occurred”. This error message suggests that the backed up PST file is corrupt and all the items including your contacts and mails etc, are deleted or lost. This can happen for various reasons including; power failure, virus attacks, file header corrution, improper termination of the Outlook application, Outlook files reaching or exceeding it's size limits, etc.
Regardless of the reason why you have deleted your Outlook contacts, or lost them due to corruption.
The corrupted PST file can easily be repaired with the help of Yodot Outlook PST Repair software. The Application employs file-by file repair technique to scan and repair severely corrupt PST file and simultaneously recovers your deleted Contacts, emails, Calendars, to do lists, Notes, Journals and other items from the PST file. The software is developed in such a way that it can even repair password protected PST files.
1: Download and install Yodot Outlook PST Repair software to your computer
2: Launch the application. You’ll find three options from the main screen. Choose “Open PST File” option to browse the PST file which is to be repaired. Use “Find PST File” option to find the PST file from the computers logical drives.

3: Select “Outlook Profile” option to choose a particular Outlook profile if you’re PC has multiple Outlook profiles.
4: The software allows you to choose the scanning techniques.
5: Choose “Normal Scan” method to repair the PST file with minor corruption. Select “Smart Scan” method to repair the severely corrupted PST file and click on “Repair” button.

6: The application starts repairing the PST file.
7: After the repair process the recovered items will be displayed in Outlook styled interface.
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