IS-PS Solution and New GL

Hi Experts,

We are in process of implementing New GLs in our central ERP systems. However we have other multiple ERP system with IS solutions running and send FI and CO messages to the central ERP systems on a daily basis.Can you please advice what are the changes and impact on the IS systems apart from activating New GL in SPRO. Do we need to make changes to the DM for transferring the messages for FI and CO or it will remain unchanged ie keep using the same message types..

Please advice.

Thanks

Saj