Azure WebApp PU update powershell version

I have deployed PU as a web app from Docker and it is up and running, but in testing, I am having trouble running scripts, as the integrated environment does not support “run-as” credentials, and the 7.1.4 environment does not appear to work. I get an error:

Error executing job: User with name ‘domain\user’ was not found.

Im hoping that i just need to update powershell, but i am kind of at a loss in that department. Im sure im just missing something simple, but would love a point in the right direction.

Product: PowerShell Universal
Version: 1.4.6