Windows credentials not being passed to api using Postman (Windows version) - asp.net-web-api2

I just installed the Windows app version of Postman. Previously I have been using the Chrome plugin. It seems the Windows version is not passing through my Windows credentials to my ASP.Net Web API application. I get 401.2 errors.
The same exact call works fine from the Chrome plugin.
Is there a configuration I am missing perhaps?
Thank you
Karl

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