Program HRALXSYNC - for integrated or standalone scenario SAP E RECRUITING?

Hi Gurus

We have sap e recruiting running on separate box and master data comes ALE from separate SAP ECC system ( PA master data).

Is program HRALXSYNC is required for standalone system also or it is only for integrated system.

This sync program is creating unwanted user id which is not required in our case. As user id supposed to created by system administrator and should flow to EREC system from central system and from INFO TYPE IT105.

Please provide your expert comments.

Thanks

Sandeep