If you need many card credentials in your access control
system, you can enroll multiple credentials at a time.
The following two enrollment methods are available in the 
Credential management task:
Automatic entry:  
This is the recommended method when the cards you want to enroll are at
                            your disposal, and when the card data is not found within any known
                            range of values. It is also appropriate to use this enrollment method
                            when the cards come in many types of formats.
 
Manual entry:  
This is the recommended method when all the cards you want to enroll are
                            the same format, and one of the data fields (typically the Card
                                number) contains a range of consecutive values. You do not
                            require the actual cards, or a card reader to use this method, and it
                            can be an effective way of pre-enrolling large quantities of cards.
 
 
                You can also enroll credentials using the Import
                        tool. For more information about importing credentials using
                        the Import tool, see the Security Center Administrator
                        Guide.