Hello Mahesh,

Thank you for reaching us!

By default, orders are downloaded with Default shipping service (NONE Vendor). In order to assign shipping services to your orders automatically, you will need to set up the shipping mapping in the channel integration. Where basically you can configure Linnworks to map the selected channel shipping method to a postal service that you have added to Linnworks.You can find a step by step guide about shipping mapping in the following link: https://www.linnworks.com/support/settings/channel-integration/shipping-mapping/ 

Alternatively, you can consider using Rules Engines to assign a specific shipping service. More information about setting up Rules Engine can be found here: https://www.linnworks.com/support/order-book/rules-engine/

I hope this information is useful to you.

Have a nice day ahead!

Regards,

Angela