How to change the sender user id of workflow

Hi,

From our system workflow three mails are sending to different recipients. Two mails are sending through WF-BATCH user and another one mail is send through ADMINU user. Now we want send other two mails also should send through ADMINU user only not by WF-BATCH.

We know that WF-BATCH is the standard user provided by SAP will send mail through workflow. but how to change this user.

In ECC 6.0 we could see the transaction SWNCONFIG to make changes for sender. But in 4.7 that transaction is not there.

So could you please tell me, how to change sender of workflow mail from WF-BATCH to ADMINU.

Thanks in Advance.

Regards,

Ajay