Question
Enable Modern Authentication for Office 2013
Answer
What is modern authentication?
Modern authentication brings Active Directory Authentication Library (ADAL)-based sign-in to Office client apps across platforms. This enables sign-in features such as Multi-Factor Authentication (MFA)and it removes the need for Outlook to use the basic authentication protocol.
How to enable modern authentication for Office 2013 clients
There are several steps involved to enable modern authentication for any devices running Windows (for example on laptops and tablets) that have Microsoft Office 2013 installed.
1. Edit the following registry keys. The keys have to be set on each device that you want to enable for modern authentication:
| Registry key | Type | Value |
| HKCU\SOFTWARE\Microsoft\Office\15.0\Common\Identity\EnableADAL | REG_DWORD | 1 |
| HKCU\SOFTWARE\Microsoft\Office\15.0\Common\Identity\Version | REG_DWORD | 1 |
2. In Outlook 2013, navigate to File\Outlook Account\Sign out.
3. Restart computer. (Do not open Outlook)
4. Wait for Duo enforcement. Verify that Duo has been enforced using CAS sites.
5. Open Outlook 2013. Verify that Duo login is required.
How to disable modern authentication for Office 2013 clients
To disable modern authentication on a device, set the following registry keys on the device:
| Registry key | Type | Value |
| HKCU\SOFTWARE\Microsoft\Office\15.0\Common\Identity\EnableADAL | REG_DWORD | 0 |
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