Questions about MRP controller update

Hi there,

We are on ECC 6.0 and implemented update to EHP4.  I have two questions: We did MRP controller update via OMD0  and found the button of "transport" is grey out. Does it means MRP controller configuration will no longer be updated in Production client via transport from DEV / QAS but only be set up directly in PRD?  Is there any SAP documentation about this change?  I thought it was allowed to be transport before.

Anther question, is there a table for the MRP controller change log?

Thanks very much in advance.

Susan