Trying to integrate Dynamics 365 (On-Prem) with SharePoint 2013 (On-Prem). As far as I can tell I've followed the documentation to a tee and was able to issue all the powershell commands without error. But once I get to the point of actually running through the Integration wizard I receive a 'Failed Authentication' error and in the resulting Error Log it just says "The remote server returned an error: (401) Unauthorized."
I enabled trace on the CRM side and the only thing I can locate in the log is that same error without any additional info and the SharePoint ULS logs yield no valuable information either.
How can I troubleshoot this?