Hello all,
I have been bashing my head against the wall attempting to enable Server-based integration between my D365 9.1 instance and my Sharepoint 2019 on-premises instance.
I have been using the steps based upon this link:
Configure server-based authentication with Customer Engagement (on-premises) and SharePoint | Microsoft Docs
The error we effectively get is "Failed Authentication"

<errorlog><sites>
<site>
<url>SERVERNAME/.../CRM-dev
<exception>Failed to connect to SharePointSite.</exception>
<errorcode>-2147088205</errorcode>
</site>
</sites></errorlog>
Looking online, that error is exceptionally generic, and leads only into a circular loop where the Sharepoint Integration configuration needs to be checked.
Has anyone experienced this before or anyone who might know a way around it.
I have tried 2x different sharepoint sites with no success.
Our Dynamics 365 instance is 9.1.4.31 (september 2021).
Please advise.