we are in the middle of upgrading to ECC6 and have noticed that a particular type of Business Partner has started to come through our middleware from R3 to CRM. We have created these in R3 in the past and they have not come through the middlware. No customizing or Z program changes have been made, so we're struggling to understand why this has started to happen.
I believ we could just stop them coming through using transaction R3AC1 as a last resort in CRM but I would have thought that they should not be getting that far in the first place and would like to understand the real reason for the problem.
Can anyone give me some advice on where I should be looking to solve this problem ?