Fix Yammer and Viva Engage SSO Login for Digital Signage
Question details
The user needs to configure seamless Single Sign-On (SSO) for Yammer or Viva Engage on a digital signage device without any manual user interaction.

- Product
- Microsoft 365
- Device & OS
- not provided
- Scenario
- Setting up a digital signage device to automatically display Yammer or Viva Engage feeds without requiring someone to manually enter a username or password.
- Observed behavior
- Microsoft 365 applications sign in automatically via SSO on the digital signage, but the Yammer or Viva Engage URL still redirects to a manual username sign-in page.
Ensure you have global administrator access to the Microsoft 365 admin center and your organization's identity provider, and verify that your generic signage user accounts are active.
Enforce Office 365 Identity for Yammer
Enforcing Office 365 identity ensures seamless SSO across all Microsoft 365 services, eliminating the secondary manual sign-in prompt specifically for Yammer.
When Microsoft 365 applications use SSO but Yammer requires manual authentication, it indicates that Office 365 identity is not fully enforced for the Yammer network. Enforcing this policy links Yammer directly to the Microsoft 365 authentication token.
Sign in to the Microsoft 365 admin center using an account with global administrator privileges.
Navigate to the Yammer or Viva Engage admin center from the available list of administrative portals.
Go to the 'Network Admin' section and click on 'Security Settings'.
Locate and check the option to 'Enforce Office 365 identity in Yammer', then save your changes.
Restart the digital signage device to clear active sessions and test the automated sign-in flow to confirm the manual prompt is gone.

Verify Identity Provider and App Assignments
Ensure that the generic digital signage user is properly assigned to the correct groups within your Identity Provider (e.g., Okta) to authorize auto-login.
Open a Microsoft 365 Service Request
If identity enforcement does not resolve the routing issue, contact Microsoft support for tenant-specific redirect URL parameters.
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Frequently Asked Questions
Why does Yammer ask for a password when Microsoft 365 signs in automatically?
This happens when Office 365 identity is not strictly enforced within the Yammer network settings. As a result, Yammer falls back to its own separate authentication flow instead of using the active Microsoft 365 SSO token.
Is there a specific URL parameter to force Yammer SSO without user interaction?
Currently, there is no officially documented URL string that independently forces Microsoft 365 authentication and seamlessly redirects to Yammer without any user interaction. Enforcing Office 365 identity globally is the recommended solution.
Can I use Okta to bypass the Yammer sign-in screen on digital signage?
Okta can pass the correct authentication tokens as long as the digital signage user is assigned to the appropriate application groups and Office 365 identity is enforced. Ensure your generic signage account is actively assigned to both M365 and Yammer in your Okta portal.




