Hi,
Here some comments:
1. My understanding was that because company C is not under company B, the invoices should be only visible in company A.
In AX you cannot only make intercompany payments that debit one company and credit another company but also payments in other companies.
That is, if you are in company C you can make a payment that debits a vendor and a bank account in company B.
That is why you see those invoices in the settlement form even though it might be confusing for you.
I can see the same in my demo environment.
2. Please also note that for some reason the payment proposal for managing the centralized payments in our version is very slow. it takes more than one hour to create the list and our only option is settlement form for now
Is this because you have so many open invoices and the form needs long to load or because of some system modifications that have been made.
Can you have a developer taking a look at that because 1 hr is really a long time?
Best regards,
Ludwig