Copy Valid_to dates to Follow-up document

Good evening,

Can you help me to copy the CRMT_VALID_TO datetime to FOLLOW-UP document?

There are fields in se11: CRMD_ORDER_INDEX-DATE_2 (CRMT_VALID_TO) ot SCAPPTSEG-TST_TO (the same).

I am try to create follow-up document. And want copy these fields.

I must use Badi CRM_COPY_BADI? If yes, how i must use it? Because i am not found this dates (valid_to) in COPY_DATES Badi.

Regards,

Best wishes!