This interface should involve a BAPI, which is a Function Module that goes into or out of SAP.
1. SE37/ type in "BAPICREDIT and you should get 16 Credit BAPIs, one of which will be the one you are looking for.
2. Transaction FD33/Status click on Credit Limit F1 then F9 or F10 and you get KNKK-KLIMK.
3. Click again on Field Name KLIMK and then where used Function Module Interfaces and you should get CREDIT_EXPOSURE.
4. Test/Execute all of the above Function Modules to make certain which one will be usable for what you want it to do.
The presumption here is that a third parting finance company is providing the data for updating the credit limits. Keep the credit horizon short with this in mind as they do not have visibility to dynamic credit calculations. Also, you will probably have to set up the finance company as payers for the customers that use them.
There is an OSS note listing additional credit monitoring reports including RFDKLIAB which shows changes made to credit limits.
Hope this helps, Pete
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