Reverse postings - Accounts receivable data

Hi All,

We have datasources 0FI_AR_4 and 0FI_GL_4. The R/3 team is going to make some changes to the 2011 AR entries like reverse postings, adding new data, deletion of some existing data. This will also be affecting some GL data. SO can you please let me know what should be done in BW to ensure all the data is loaded to BW with out any issues(no data is corrupted). There is no compression on my cubes. The data flow is psa-dso-cube.

Thank you!