Relationship Between System User Name & Pers. No.
Use
To ensure that an employee can be identified in workflow, a system user name must be related to the personnel number created for him or her.
The simplest way to define this relationship is by using infotype 0105 Communication.
Activities
Maintain the Communication infotype (0105) for all of the employees who are possible agents for Travel Management workflows. The system includes subtype/communication type 0001 - system user name (SY-UNAME) for this purpose.
If you require further information, see the relevant sections in the Implementation Guide by choosing Personnel Management