I am currently working on an Outlook Add-in which authenticates the user against Azure AD and runs queries against the SharePoint Online sites. The app uses AngularJS and makes use of a ADAL.js and ADAL-Angular.js libraries to conduct a authentication process. The app works well within my browser, but fails during the authentication process when used through a Windows Version of Outlook.
Once a user inputs his username and password within a add-in in Outlook (for Windows), and the Internet Explorer window pops up with the message as shown below for your reference :
AADSTS90056: This endpoint only accepts POST requests.
Has anyone encountered this issue before? I have tried to follow the Office Dev tutorials to the letter, but still no luck.