SAP CRM and ECC data archiving

Hi

I'm looking at setting up archiving for CRM and ECC and was wondering if the SAP standard solution can do this and keep the data synchronized.

As we have connected CRM and ECC systems the master data is replicated and the same data would need archiving in both systems otherwise it will cause integrity issues.

I'm also looking at archiving transactional data but I'm hoping that doing this in each system as a standalone should be ok as the transactional data isn't replicated across the two SAP systems.

Any pointers on the best way to do this and if it's even possible with SAP standard routines would be appreciated.

Thanks

Chris