Our customer in NAV2016 is natively integrated with Dynamics CRM (on-line), using the standard Dynamics NAV - CRM integration. Originally was connecting to Dynamics CRM 7.0.
During 2017, the Dynamics CRM was upgraded to version 8, so the integration stopped working (we started receiving a metadata error). We updated a few libraries (XRM) on the NAV service and client from the latest CRM SDK and the communication between both was re-stablished.
Recently Dynamics CRM has been upgraded to version 9, again resulting on the communication between NAV and CRM being broken. We have proceeded as before, downloading the latest CRM SDK and changing libraries on the Dynamics NAV folders (client and server).
However this time the metadata error persists (this time version 9). So we don't know if there is some file or configuration that we are missing upgrading, or we need to do something differently.
We have also proceeded to change the server settings (Windows Register) to use TLS1.2, just in case it was the cause of the issue, but the only result of that is a different error this time ("authentication error"). We can roll back these changes.
Can anyone give any suggestion on anything that we should be taking into account or possible fixes?
The steps given are essentially what described on this blog: