This has been a topic of discussion for the past 7 years without any effort on Shipstation's end to add this feature. It comes highly requested (http://feedback.shipstation.com/forums/126593-idea-archive/suggestions/6736736-trackable-fedex-fims-mailview-integration?page=1&per_page=20) as hundreds of people have responded to the previous discussion board. ShipStation initially responded they'd take a look but never got back to it.
ShipFims integration with ShipStation has been delayed long enough - your customer community is asking for this. Please consider adding this integration.
Sincerely,
Hundreds of customers
