

You will need to sync users from your Active Directory to your Microsoft 365 account. Microsoft 365 requires that users are already provisioned inside Microsoft 365 when an authentication attempt happens. Enable Directory Synchronization in Microsoft 365

It is recommended that you have a tenant administrator account in your "" so you don't lock yourself out of your tenant. Configure Single Sign-Onīefore configuring Microsoft 365 you'll first need to enable Duo Single Sign-On for your Duo account and configure a working Active Directory authentication source. required for SharePoint but not Yammer), see our instructions for Duo for Azure Active Directory Conditional Access. If you're interested in a Duo solution for Microsoft 365 that doesn't require installing any on-premises Duo components and allows Duo to be applied per Microsoft 365 application (i.e. Duo checks the user, device, and network against an application's policy before allowing access to the application. For example, you can require that Salesforce users complete two-factor authentication at every login, but only once every seven days when accessing Microsoft 365.
#Format for user names used by office 365 apps update#
Microsoft domains federated with Duo SSO on or before Februmust update the federation configuration following the steps in Duo Knowledge Base article 7538.ĭuo Single Sign-On is available in Duo Beyond, Duo Access, and Duo MFA plans, which also include the ability to define policies that enforce unique controls for each individual SSO application.

Microsoft 365 domains federated to Duo SSO after February 24th automatically have MFA support for their federated domain enabled. Once you federate a custom domain your Microsoft Online tenant with Duo Single Sign-On, all Microsoft 365 applications will redirect those federated users to Duo when they sign in, while cloud-only (non-federated) users continue to log in using the Microsoft Online sign-in form.ĭuo Single Sign-On satisfies Azure AD MFA requirements as of February 24, 2022. Duo SSO acts as an identity provider (IdP), authenticating your users using existing on-premises Active Directory (AD) and prompting for two-factor authentication before permitting access to Microsoft 365. Duo Single Sign-On (SSO) is our cloud-hosted SSO product which layers Duo's strong authentication and flexible policy engine on top of Microsoft 365 logins.
