How to find the User who changed the connection settings

Hi Gurus,

I am basically a BW guy but i am looking at your precious Guidance in this issue.

We have a situation in our BW production system. The job loads are working fine till now but seems like someone has meddled with RFC connection with R/3 prod.

The connection between R/3 and BW is broken. I would like to know if there is any way to find the User or some Log to find who might have medelled with the RFC's .

Help is greatly appreciated.

Regards

satish M