As of 1808 release SuccessFactors has a new feature that enables the user who has been rehired with new employment to log in the system with the old username.
SAP - SuccessFactors - Employee Central 1808 or newer versions
Enable Login with Old User Name, login using old username, previous username, username, login , KBA , LOD-SF-EC-HIR , New Hire/Rehire Wizards , How To
About this pageThis is a preview of a SAP Knowledge Base Article. Click more to access the full version on SAP ONE Support launchpad (Login required).
Search for additional results
Visit SAP Support Portal's SAP Notes and KBA Search.