SAP EBP

I posted a question a few weeks ago regarding receiving MML encrypted envelopes from the SAP EBP system and someone responded that I should use the C1 OnRamp package to handle this.

But according to WM support I have to use the SAP Adapter in order to receive encrypted xCBL envelopes from the SAP EBP application (which we’re not licensed for)

I’m wondering who is correct. Has anyone using Integration Server ever received MML encrypted envelopes from SAP EBP? If so did you use the C1 OnRamp to do this or the SAP Adapter? Thanks.