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Can anyone help me out with this. I've had no problem doing this for years, however yesterday I installed a fresh copy of windows 10 pro (MS download tool), and installed a fresh latest copy of Office Pro Plus 2019 VL (O365 deployment tool).

When I open outlook and enter ANY office 365 email account, or outlook.com account, it brings back the standard windows credential prompt, rather than the Single Sign On / modern authentication / 2FA / MFA style prompt. This works correctly on other devices (so a client end problem).

Anyone know why this has suddenly started happening, and how to fix this?

  • I have tried both the latest version (I think LTSB2018 10357.20081) and the oldest version (LTSB2018 10336.20015)

  • I have tried manually creating the profile and selecting O365 / outlook.com

Thanks!

UPDATE

This was never resolved. Office 365 edition apps were deployed instead of "Pro Plus 2019". Office 365 edition apps are compatible with Office 365 / Outlook.com 2FA. I still to this day do not know why the traditional (non Click-To-Run C2R) package versions of Office do not support it.

Henry
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1 Answers1

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Is your environment a hybrid deployment? If it is, you could refer to this article. Outlook prompts for password when Modern Authentication is enabled

In addition, you could try to delete login credentials in Windows Credentials. For more details: Why is my Outlook client not showing a 2FA prompt when Office 365 is protected by Duo?

Joy Zhang
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