When you start the add printer wizard on windows 7 or windows server 2008 R2 (and probably windows 8 and windows server 2012) not all your printers are displayed in the list. But all printers are configured to be listed in Active Directory.
It seems there is a default limit set to only show 20 directory printers in this list. You can change this amount with a Group Policy:
- Open Group Policy Management
- Add a new policy or edit an existing policy
- Browse Computer Configuration – Administrative Templates – Printers Add Printer wizard and edit Network scan page (Managed network)
- Enable the policy and change the value for Directory printers to a higher number. This is the amount of printers you will see in the list.