They use internally the following end point :
POST on https://tenant.api.identitynow.com/diana/sources/sources/{{sourceId}}/updateCorrelationConfig
Example of body :
{
"attributeAssignments": [
{
"operation": "EQ",
"matchMode": null,
"property": "name",
"value": "id",
"ignoreCase": true,
"operationMatchMode": "EQ"
}
]
}
property : is the identity attribute name
value : is the account attribute name
Base on this discussion POST /api/source/setCorrelationConfig - Identity Security Cloud (ISC) / Non-Public API Deprecations - SailPoint Developer Community the endpoint will be replaced in the future.
You can request also Sailpoint.