SOAP HTTPS with certificate

Hello,

we are connecting to Datacash provider using SOAP with HTTPS from an SAP PI 7.31.

This is one scenario we are migrating from a XI 3.0 system where this interface currently works!!!!!!

The certificate and private key are added to the key store. Settings for the receiver channel are the same as in the old XI.

What astonishs su is that the certificate is already expired since years but works in XI!

The key store flags both in red.

Our issue:

We can get no connection. The error is

Communication over HTTPS: Unable to create a socket".

Network guys say the firewall does not block the traffic for the address.

So we are not sure if this is related to the certificate. Does PI 7.31 block communication because of the cert expired?

Regards

Dirk