SSO SAML Assertion Validation Fails for WFM Self-Service Portal

Administration
1
  • No idea why this is happening, the SAML assertion validation is failing specifically for agents accessing the Workforce Management self-service portal while the main Genesys Cloud admin console works fine. The error code 401 Unauthorized appears immediately after the IdP redirect.
  • Environment details: Genesys Cloud v24.2.1, Azure AD as IdP, and the WFM module is set to use the same SSO configuration as the core platform. The clock skew is verified to be under 60 seconds on all servers.
  • The SAML response includes the correct aud URI (https://api-us.genesys.cloud), but the WFM service seems to reject it. Debug logs show the signature validation passes, yet the token exchange fails with a invalid_grant error.
  • This issue prevents agents from logging in to submit shift swaps or request time off, which is critical for our weekly schedule publishing process in the Chicago timezone. The admin login works because it uses a different token endpoint, but the WFM-specific OIDC flow is broken.
  • Has anyone encountered a mismatch between the core platform SSO config and the WFM module’s OIDC client registration? We are trying to avoid disabling SSO for WFM, as that would break our compliance requirements for secure access.
2

What’s probably happening here is that a subtle mismatch in the SAML Assertion Consumer Service (ACS) endpoint configuration between the core Genesys Cloud interface and the WFM self-service portal, which often treats them as distinct trust boundaries despite sharing a tenant ID. While the admin console validates against the standard /api/v2/oauth/token flow, the WFM portal frequently requires a specific redirect URI mapping that isn’t automatically inherited if the IdP metadata was updated after the initial SSO setup. Check the Azure AD Enterprise Application configuration to ensure the Reply URLs include both https://[your-organization].mypurecloud.com/ and the specific WFM subdomain path, typically https://wfm.[your-organization].mypurecloud.com/. If these are missing, the IdP will reject the assertion because the destination doesn’t match the registered allowed recipients. Additionally, verify that the NameID format in the Azure AD attribute claims is set to email or persistent consistently across both applications, as WFM sometimes enforces stricter schema validation for agent identifiers. You should also inspect the SAML response for the NotBefore and NotOnOrAfter conditions; even with a verified clock skew, some IdP implementations add extra padding that might push the validity window slightly out of sync for high-latency routes common in APAC regions. If the issue persists, try capturing the SAML trace using the browser developer tools network tab, look for the SAMLResponse parameter, decode it from Base64, and check the Destination attribute. It must exactly match the ACS URL configured in Genesys Cloud for WFM. Finally, ensure that the WFM module isn’t enforcing a separate MFA challenge that is failing silently, returning a 401 instead of a proper redirect loop, which can happen if the session cookies are scoped incorrectly between the two domains.

3

If I recall correctly, the ACS endpoint must include the specific tenant domain suffix for the WFM module, otherwise the signature validation fails.

{
 "acsUrl": "https://tenant.mygenesys.com/wfm/api/v2/sso/callback"
}