SAML Assertion Attributes - Missing 'uniqueUser' causing provisioning failures

Administration
1

hi all,

something’s broken in our SAML integration - SCIM provisioning is failing for new users. it’s not a full outage, more… intermittent. been seeing this for the last 24 hours.

we’re on Genesys Cloud, obviously. using the latest SDKs for attribute mapping - v6.1.103.0. the IDP is Okta, configured with the standard attributes, but the uniqueUser attribute isn’t consistently making it through the SAML assertion.

here’s what i’ve checked so far:

  1. Okta Configuration: Attribute statements in the Okta application are correct. uniqueUser is mapped to the userId attribute, which is populated in the assertion.
  2. Genesys Cloud SAML Settings: SAML settings in GC are pointing to the correct IdP metadata. attribute mapping is set up to pull userId into the uniqueUser field.
  3. Assertion Debugging: using a SAML tracer, i see some assertions do contain uniqueUser, and provisioning works fine for those. but roughly 20% of assertions are missing it.

here’s a sample of a failing assertion - stripped down for brevity. it’s missing the uniqueUser completely.

<saml2:Assertion xmlns:saml2="urn:oasis:names:tc:SAML:2.0:assertion" ...>
 <saml2:AttributeList>
 <saml2:Attribute Name="firstName">
 <saml2:AttributeValue>john</saml2:AttributeValue>
 </saml2:Attribute>
 <saml2:Attribute Name="lastName">
 <saml2:AttributeValue>doe</saml2:AttributeValue>
 </saml2:Attribute>
 <saml2:Attribute Name="userId">
 <saml2:AttributeValue>johndoe123</saml2:AttributeValue>
 </saml2:Attribute>
 <saml2:Attribute Name="email">
 <saml2:AttributeValue>john.doe@example.com</saml2:AttributeValue>
 </saml2:Attribute>
 </saml2:AttributeList>
</saml2:Assertion>

the error in Genesys Cloud is a generic SCIM error:

Error Code Description
SCIM-2002 Invalid input. The request body is missing required attributes.

i’m suspecting some sort of race condition on the Okta side. it’s driving me crazy.

important: before you suggest anything, please remember we have strict OAuth token rotation policies. all API calls are made with short-lived tokens - we refresh every 15 minutes. it’s not a token issue.

anyone else running into this? is there a known issue with SAML assertions in Genesys Cloud? is there some hidden log i’m missing?

2

The intermittent failures suggest a race condition in the attribute mapping pipeline - think of it as an assembly line where some parts arrive before others. Specifically, the SAML assertion’s attribute resolution isn’t fully synchronized with the SCIM provisioning process, causing uniqueUser to be absent in some requests.

To confirm, inspect the raw SAML assertion payload using a network proxy like mitmproxy - you’ll want to verify the attribute names match the configured mapping exactly. Here’s a sample payload check list:

Attribute Name Expected Value Observed Value Pass/Fail
uniqueUser User Principal Name [actual value]
firstName Given Name [actual value]
lastName Family Name [actual value]

If the assertion lacks the attribute, review the Okta application’s attribute statements - the configuration may need adjustment.

1 Like