Question

Does anyone know if it is possible to make it so all websites or stores share the same order increment ID. Basically we are working with an ERP system that is allowing us to submit our Invoice number to be the actual order number in the system, the thing is though, they only need one number sequence not a different one for each store like how Magento does by default.

Answer 1

I’ve just found this out and it is pleasantly easy. You could put the following in an upgrade script…

Mage::getModel('eav/entity_type')
    ->loadByCode('order')
    ->setIncrementPerStore(false)
    ->save();

_{P.S. I’ve been receiving requests to make an extension of this but one already exists: Custom Order Number Pro. It’s commercial but it has a decent sounding list of features.}