Credit exposure category 300 in FSCM Credit management

Hi experts,

I would like to know how and on what basis the credit exposure category 300(Special Credit Exposure) is getting update in FSCM credit management. I tried to post a Down payment special GL posting for a customer but that is getting updated under category 200 only.

Please let me know how & when the credit exposure category 300 will be updated.

Thanks

Prabhakar