Today I found a neat little trick that removes this need. Fiddler to the rescue!
Start Fiddler and enable it's option to auto-authenticate:


Then configure your account in tfx and force it to use basic auth:
C:>tfx login --auth-type basic --service-url https://jessehouwing:8080/tfs/DefaultCollection
You'll be prompted for a username and a password, it doesn't really matter what you enter, fiddler will handle the authentication for you in the background:

As long as Fiddler is running and configured to handle auth, you can use tfx against your TFS 2015 server.

Jesse Houwing
Jesse is a passionate trainer and coach, helping teams improve their productivity and quality all while trying to keep work fun. He is a Professional Scrum Trainer (PST) through Scrum.org, Microsoft Certified Trainer and GitHub Accredited Trainer. Jesse regularly blogs and you'll find him on StackOverflow, he has received the Microsoft Community Contributor Award three years in a row and has been awarded the Microsoft Most Valuable Professional award since 2015. He loves espresso and dark chocolate, travels a lot and takes photos everywhere he goes.
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