Executing a .exe using Powershell on a remote server with Azure agent

Actually that's the funny part - there is no error displayed in the pipeline, but it executes successfully. However, the outcome of the .exe is not realized (it's supposed to produce a log file on the server). After much trying, we were able to tweak some things and finally found that the PS session was not launching to execute the exe. However, when we login manually to the server,open a PS session and execute the .exe, it runs successfully.