NAV 2017 unable to activate CRM Connection

Hi all,

we are currently facing issues with activating a CRM connection. The below error is thrown when activating the connection or executing Test Connection within the CRM Connection Setup.


NAV Version is NAV 2017 W1 CU 6 (16585)
CRM Version is CRM 2016 UR2 8.2.0.749

DynamicsNAVIntegrationSolutuion: 10.0.16585.0

So far, we've verified the whole environment and implementations both from the CRM and NAV perspective but we're still unable to get behind it.

Did anyone made similar experiences or has any hints at which point we should look at to resolve this problem?

We've wasted a couple of days on that issue already so any help is highly appreciated.
Many thanks in advance

AndrewT