How to fix “- – the web site does not support SharePoint Online credentials. The response status code is ‘Unauthorized'” error

While running some SharePoint Online -PowerShell commandlets, or connecting to a SharePoint Online site from your app, you get a following (or similar) error about your SharePoint Online credentials being unauthorized for something you should definitely be authorized to do:

And that’s not all – by digging into the full error message, you find the underlying internal error:

What awakens my curiosity, is this line:

However, when you open your browser, you can actually log in without a hitch. If that’s the case, this might be a weird internal error in SharePoint Online – doesn’t matter, there’s a hazy and weird, but simple fix!  Continue reading

SharePoint Windows Authentication fails on other addresses than localhost

This post describes how to fix Windows Authentication on a SharePoint server failing on other addresses than localhost.

Symptoms

You get the standard Windows/Basic Authentication prompt when accessing your SharePoint site, but the site won’t accept your credentials when your accessing the site using an address like http://website. However, using address like http://localhost works fine (but of course may cause other problems).

You also get event log entries like this (most likely in System -category):

The program w3wp.exe, with the assigned process ID, could not authenticate locally by using the target name HTTP/WEBSITENAME.

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