Question : How to add printers in an ADUC OU

I would like to manage my OUs into, Users_OU, Groups_OU & Printers_OU.

I have already added the printers in the Printers folder with "Add Printer" & have listed them in the directory, but how do I add them into my Printers_OU ?

Answer : How to add printers in an ADUC OU

Sorry, I misread your post:

"I have already added the printers in the Printers folder with "Add Printer" & have listed them in the directory, but how do I add them into my Printers_OU ?"

To do this,

1) open AD Users and Computers
2) Right click your domain and choose FIND
3) In the first window called FIND, use the dropdown box to show "PRINTERS"
4) Hit the FIND NOW button  (no need to put anything in name box)  <-- all of your printers listed in AD will be displayed
5) Right click any printer and choose MOVE from the drop down box.  Select a destination OU to finish the wizard.