Username Not Generated as per User Name Generation Rule

Summary:

Updating the User Name Generation Rule to Person or party number is not generating the username as required

Content (required):

1. Till now we used User Name Generation Rule as FirstName.LastName (on TEST environment).
2. For Production, client has requested to use the Person Number as the Username. So, we have updated the User Name Generation Rule from FirstName.LastName to Person or party number in the User Category Information from Security Console on TEST environment to check and confirm the scenario.
3. After performing the above steps, I converted the Pending Worker to an Employee (which follows the Hire an Employee approval process flow) after bypassing the approvals.