That part I am not sure of. I installed 2024.1 on my local computer and ran into the same issue with not being able to change the target. I have %ALL access so I wouldn't think it would be a permissions problem. I briefly demoed it to our developers. Everyone liked the old version better. I turned it off and haven't looked back.
We recently upgraded our environment to 2023.1 which included the new rule editor ui. We immediately disabled the new ui to revert to the version that our team was comfortable with.
https://docs.intersystems.com/healthconnectlatest/csp/docbook/DocBook.UI...
I think you should be able to use something like “%PrimaryRequestHeader.SourceConfigName” to access values in the header. I have done it in a rule but haven't tried it in a DTL but I assume it will work the same way.
Update: %PrimaryRequestHeader is defined in Ens.BusinessProcess so I'm not sure you can reference it that way in the DTL.
