Functionality - It allows you to update the length of the employee number. 

Accessibility: Admin role only

Note -If your employee number length is not matching the configured employee number length, you can get the below error:

Validation Message : Employee Number is bigger than the configured Employee Number size setting

Process -

Path: Configuration>>System>>Account Options

Update the Emp No Length fields as per your employee ID length, which has to be uploaded to the system.