Multiple federated accounts cannot login to Outlook Desktop

Pontus Själander 

• ADFS IDP URL is added under Trusted sites in IE and controlled by system admin through group policy. 
• ADFS IDP URL being in Trusted sites makes user to auto-login to this site using his AD Account login to PC
• Credential Manager do not have any entry for new account I'm trying to add
• I shutdown Outlook
• Opened Mail app from control panel > added email and password
• Then I see prompt of modern authentication for about 2-3 seconds and then it disappears
• Config wizard says "Congratulations! Your email account was successfully configured and is ready to use."
• I closed wizard, opened Outlook.
• Now, I continuously see modern authentication prompt appear/disappear
• Newly mailbox is collapsed and when I try to expand it, I see following message:

So, the issue still persists. I think when I try to add new account, it redirects to Microsoft modern authentication prompt. Microsoft authentication prompts figures that this domain is federated and it redirects to our ADFS for authentication. On ADFS, previous user is already signed in so based on single-sign-on concept, it uses current session and pass token to Microsoft. Now, Microsoft was expecting token for a new account but it received for the existing mailbox and hence we cannot authenticate to new account.