I realize that this post is almost 2 years old, but I am now facing the exact same problem: We are trying to use the SFTP-SSH connector to transfer e-invoices and corresponding receipts from Business Central SaaS via Azure Storage to/from a SFTP-server at a major Payment Management Provider in Norway. Uploading files from the Azure storage to the SFTP using the connector works fine but downloading files from the SFTP fails with the exact same error message (404 path does not exist). Even when stating the path and file name directly, or when selecting a specific file manually in the setup of the Logic App, the Get File Content fails. Downloading the files using WinSCP or any other SFTP client works fine (our user has full access and can put/get/delete files from the path in question). From the connection details I can see that the Payment Management Provider is using a "Maverick SSHD" SFTP-server, which is not on your list of unsupported servers. Having the SFTP owner change any settings on their side is not an option. Is there anything we can try to change in the Logic App/Connector settings to make this work?