SharePoint is not broken - it just does't work

How to fix “The website does not support SharePoint Online credentials. The response status code is ‘Unauthorized'”

Whilst running some SharePoint Online PowerShell commandlets, or connecting to a SharePoint Online site from your app, you get the following (or similar) error about your SharePoint Online credentials being unauthorized for something you should definitely be authorized to do: Cannot contact web site ‘https://[tenant]-admin.sharepoint.com/’ or the web site does…Continue reading How to fix “The website does not support SharePoint Online credentials. The response status code is ‘Unauthorized’”

SharePoint is not broken - it just does't work

App authentication woes on SharePoint (Token request failed. The remote server returned an error: (401) Unauthorized.)

This article explains how to get rid of sudden and unexplainable 401 Access Denied errors when trying to authenticate against a fairly fresh Microsoft 365 / SharePoint Online tenant. This issue seems to be caused by a long-ish project to finally retire ACS – Azure Access Control service) on SharePoint…Continue reading App authentication woes on SharePoint (Token request failed. The remote server returned an error: (401) Unauthorized.)