PersonnelFileHandling: PATCH CompanyPersonSet returns 200 OK but does not update the employee’

Hello,

I am trying to update an employee’s information using the IFS REST/OData API. The PATCH request returns HTTP 200 OK, but the response still contains the previous name, and the Employee File screen does not reflect the requested change.

I am testing directly in Postman before implementing the update in Boomi.

PATCH https://<ifs-host>/int/ifsapplications/projection/v1/PersonnelFileHandling.svc/CompanyPersonSet(CompanyId='<company>',EmpNo='<emp_no>')


IFS product/version: 
 

Steps performed:

1. Retrieve the entity using GET. through
    https://<ifs-host>/int/ifsapplications/projection/v1/EmployeesHandling.svc/CompanyPersons
    
2. Extract its @odata.etag.
    
3. Send a PATCH to the same entity, using that value in the If-Match header.

   
   Headers:

   Content-Type: application/json
   If-Match: W/"<etag-from-get>"
    

   The API documentation lists FirstName in the update request schema and marks Operator, TimeClockUser, and DirectSub as required.
   
   Request body:

   {

     "Operator": "<operator-value>",

     "TimeClockUser": "false",

     "DirectSub": false,

     "FirstName": "UpdatedName"

   }

   Actual result:

   The response returns 200 OK, but includes:

    

   {
    

   "Operator": "<operator-value>",

     "TimeClockUser": "false",

     "DirectSub": false,

     "FirstName": "OriginalName"

   }
    

4. The Employee File screen also continues to display the original data .

   Expected result:

   The data should be updated, or the API should return an error explaining why the modification cannot be applied.

   Questions:
   
   - Should changes be performed through a different projection or entity.
   
   -Is an additional action required to persist this change?
   
   
   Thank you for your help.