How do i create in-transit transfer orders in bulk? Any mass upload feature which supports this?

Summary:

We are in the process of converting transfer orders both - open/in-transit orders. I have found the way to create the open transfer orders in bulk but not able to find the process to mark them as in-transit in bulk. Please suggest best approaches for the same. If pick wave rules, ship confirm rules should be used, please suggest the setup required as well.

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