User Exists Info needed

Hi all,

We are currently in the process of doing enhancement for Batch management.

SAP Version - 4.6C

For MIGO screen, requirement is that after posting details Batch is generated and GR is done. Followed by this expiry date of the batch is to be calculated.

My ABAP team has confirmed that no user exist is getting activated after posting of documents... Can anyone please suggest me what USER EXIT / BADI to be used??

regards,

Parshuram