I suppose you are asking how to enable background processing of MIRO transaction. By design this cannot be achieved as MIRO transaction specifically designed for online entry of invoices by A/P clerks. So there is no option of enabling background processing.
Not sure whether any BAPI is available to process invoices automatically in a program. Search for BAPIs
In case the requirement is to sort of automating the invoice posting process through MIRO, then you can think of using LSMW through recording process
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.