Error code: AADSTS90056 - This endpoint only accepts POST

This has to do with third-party cookies from Microsoft being blocked in the browser.

To fix in Google Chrome, go to:

1. chrome://settings/content/cookies?search=cookies

2. Under "Allow" click "Add"

3. Type https://login.microsoftonline.com

4. Close the browser and try again

To fix in Internet Explorer, do the following:

1. Search for "Internet Options" on the computer search bar, or Open Internet Explorer and select the gear icon in the upper-right corner of the screen, then select “Internet Options“.

2. Click on the “Privacy” tab

3. Click on the "Sites" button

4. Type the Address of the website as "https://login.microsoftonline.com"

5. Select "Allow"

6. Click “OK” and you have successfully set your cookie settings in IE