Attach is the Screen shot and it clearly explains how to do that .
As ahown in the screen shot , I copied the Order # 65376 from Operating Unit "Vision Operations" to Operating Unit "Vision Australia".
Please note that I have not changed anything else , so please make sure that Order Type "Mixed" should exits in "Vision Australia" , as well as all the Defaulting rules (if any) for the attributes like
Customer
Order Type
Shipping Method
.....
..... etc
shuold exists in the destination Operating unit.
