On the Service Order, fields "Shipment Method Code", "Shipping Agent Code" and "Shipping Agent Service Code" are available. Though, these fields are missing from the Posted Service Documents.

Please do add the missing fields, so they would be transferred from the Service Order (table 5900) to the Posted Service Documents, during posting process.
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Ideas Administrator

Thank you for this suggestion! Currently this is not on our roadmap. We are tracking this idea and if it gathers more votes and comments we will consider it in the future.

Best regards,
Business Central Team