By default, users can use the List in directory option to publish shared printers in the Active Directory.

Additionally, the Add Printer wizard automatically publishes all shared printers.

To alter this behavior:

1. Start / Programs / Administrative Tools / Active Directory Users and Computers (the MMC snap-in).

2. Right click the domain name and press Properties.

3. On the Group Policy tab, select the Default Domain Policy and press the Edit button.

4. Computer Configuration / Administrative Templates / Printers.

5. Double-click Allow printers to be published. The Explain tab contains:

   Determines whether the computer's shared printers can be published in Active Directory.

   If you enable this policy or do not configure it, users can use the "List in directory" option
   in the Printers folder or the Add Printer wizard to publish shared printers in Active Directory.

   If you disable this policy, this computer's shared printers cannot be published in Active Directory
   and the "List in directory" option is disabled.
6. Double-click Automatically publish new printers in Active Directory. The Explain tab contains:
   Determines whether the Add Printer wizard automatically publishes
   the computer's shared printers in Active Directory.

   If you enable this policy or do not configure it,
   the Add Printer wizard automatically publishes all shared printers.

   If you disable this policy, the Add Printer wizard does not automatically publish printers.
   However, you can publish shared printers manually.

   Note: This policy is ignored if the "Allow printers to be published" policy is disabled.