@Anonymous - Thanks for the question and using MS Q&A platform.
I'm not sure, why Self-hosted IR is used in the scenario.
Source: You can use AutoResolveIntergrationRuntime and enter manually details about the storage account as shown below for source subscription A: CHEPRAGEN2
Source Linked Service connection:
Desitination: You can use AutoResolveIntergrationRuntime and enter manually details about the storage account as shown below for destination subscription B: CHEPRADEMO
**
Sink Linked Service connection:**
By using the above configuration, we were able to connect adf from one subscription to azure file storage in other subscription and transfer csv files between the storage accounts as shown below.
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