SAP Knowledge Base Article - Public

2495643 - SuccessFactors User IDs - Clarifying the Different IDs


There are many different IDs that we need to consider when it comes to employee data. How do I know what each one means?

Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental.


SAP SuccessFactors Employee Central - All Versions


The following terms are often present in Employee Central at a minimum, and clearly knowing their differences can save a lot of time and facilitate the understanding of many functionalities not only in Employee Central but in the whole SuccessFactors suite. View Differentiating Between Person ID, User ID, and User Name in Employee Central

  • person-id-external
  • username
  • user account
  • user id
  • payroll id

The scenario can get more complex if you have any of the additional EC employment solutions enabled, like Global Assignments or Concurrent Employment.

In order to clarify this broad "ID" landscape, the following diagrams explain what role each ID plays in the system:

ID Landscape without additional employment solutions


The above diagram splits the picture into certain understandable elements:

  • The Person - Think of this as the Human Being - this is comparable to the person-id-external in EC.
  • The User - Think of this as an invisible account for the user that is set up in the background - this is comparable to the useraccountinfo in the back-end.
  • The Log In - Think of this as the key to the user account - this is comparable to the username in SF.
  • The Employment - Think of this as a distinct employment for a person - this is comparable to the userid in SF.

The above diagram explains how these elements are assigned (see blue boxes), the padlocks are meant to represent whether the ID can be changed or a least whether it should be changed or not.

ID Landscape with additional employment solutions (Global Assignment, Concurrent Employment or Rehire On New Employment)


The above diagram includes additional information where the following occurs:

  1. The person (and therefore the person_id_external) stays the same.
  2. A new username in the background in the format person_id_external-n (where "n" is an incremented number representative of how many employments the person has). This, however, is not used as a user-facing ID.
  3. The userid - comparable to employment, it is assigned based on the latest number at the point in time when the user is hired from the Company Setting counter.

Payroll ID is separated from this as it is in effect independent from the core ID structure and is a configurable field in EC.

FAQ - Additional Information

Q) Where can I get information on this from the Guide?

A) Guide - Chapter:Managing Mass Changes in Employee Central -  Rehiring Former Employees with an Existing User ID

     Guide - Chapter:: Rehire Employees with Data Imports /

       Rehiring Former Employees with an Existing User ID

See Also

  • 2493579 - Employee Central: Person/User IDs Used Within Employee Central
  • 3041908  - Employee ID sequence related Issues & Troubleshooting - Employee Central
  • 2722881 - User Account Decoupling Feature Behavior
  • 2627298 - Employee Number sequence is being skipped while hiring a new employee
  • 2678155 - Rule-based Generation of UserID/Username for Hires & Rehires with New Employment
  • 3236800 -Rehire with New Employment UserID and PersonID - Onboarding
  • 2835790 - How To Use The Same Username For Rehire With New Employment?
  • 2677136 - Enable Login with Old User Name - Explained
  • 3169765 - [Onboarding] FAQ on Rehire with old employement - Onboarding 2205 release update
  • 3236800 -Rehire with New Employment UserID and PersonID - Onboarding
  • 2392253 - How to modify employee User ID
  • 2730512 - Changing Username - Error Username already exists, please choose another one - Platform BizX


person-id-external, username, user account,user id, payroll id,  Next Person ID Assigned, Company System and Logo Settings , KBA , LOD-SF-EC-PER-BIO , Biographical Info - Config, Rules, RBP, UI , LOD-SF-PLT-MNG , Manage user Issues , How To


SAP SuccessFactors Employee Central all versions ; SAP SuccessFactors HCM suite all versions