Hello @arkiboys ,
Thanks for the question and using MS Q&A platform.
As per my understanding you have used an account key for your ADLS Gen2 linked service connection from ADF and when you do the test connection it works fine but when you do trigger now
then it fails with above error.
Could you please confirm if you have published your pipeline and the linked service that you have created? If not, please publish your pipeline and linkeservice changes and then try re-testing it and see if it works.
The reason is when you do a debug run it will run on the local version of your pipeline/linked service, but when you trigger now, you pipeline will run on the code that is last published to ADF service.
This kind of issue occurs(debug runs but trigger run fails) when there is a mismatch between the local version of your ADF code and already published version.
Please try to publish all your changes and try to trigger now and see how it goes.
Thank you