For Aramex to send from different locations, these are handled by sub accounts. You would need to have sub accounts already created for the different dispatch locations.
Once you have the sub accounts active you can add these addresses to the App and edit the address on orders as needed.
If so you can add these to the app and select which is to apply by editing the sender address in each order. Find the order and click view order and book shipment.
Scroll down to Sender Address and click edit. You will see the drop down and be able to select the Sender address.
