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How to Fix Viva Engage External Network Sign-In Errors
Question details
Users are experiencing errors when attempting to accept Viva Engage external network invitations or sign into external networks.
- Product
- Microsoft Viva Engage
- Device & OS
- not provided
- Scenario
- Accepting an external network invitation or signing in as a guest.
- Observed behavior
- Sign-in fails with error messages such as 'Service not enabled for this user' or 'This username may be incorrect'.
Ensure you have Viva Engage network administrator privileges and access to the Microsoft Entra admin center before attempting to modify guest access settings.
Enable External Messaging in Network Admin Settings
Network administrators must explicitly allow external messaging to ensure guests can access the Viva Engage network.
By default, Viva Engage may restrict external communication. To allow external guests to sign in and participate, the network administrator must adjust the security settings.
Log in to Viva Engage using a network administrator account and click the gear icon to open Network admin settings.
In the admin menu, select 'Security settings'.
Scroll to the 'External Messaging' section and check the option to enable guest access for external networks.
Save your configuration changes and instruct the external user to retry accepting the invitation.
Create the User as a Microsoft Entra B2B Guest
If guest access is enabled but the error persists, the user might need to be explicitly added to Microsoft Entra ID (formerly Azure AD).
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Frequently Asked Questions
Why do I see 'Service not enabled for this user' when joining a Viva Engage external network?
This error typically occurs when the Viva Engage network administrator has not enabled 'External Messaging' in the security settings, or your account has not been properly provisioned as a Microsoft Entra B2B guest.
Can standard users fix Viva Engage external network sign-in errors?
No, resolving these specific sign-in errors requires a Viva Engage network administrator or a Microsoft Entra ID administrator to adjust the organization's guest access and security policies.
How do I invite an external guest to a Viva Engage community once settings are correct?
Once the administrator has enabled External Messaging and created the B2B guest account in Microsoft Entra ID, community admins can invite the user by typing their email address into the 'Add members' field in the specific Viva Engage community.
