We have an on-premises Microsoft Dynamics environment integrated with SharePoint Online.
We are currently attempting to configure Server-Based SharePoint Integration, but we are encountering the following error during the validation/configuration process:
<errorlog>
<sites>
<site>
<url>https://tenantname.sharepoint.com/sites/xxxx</url>
<exception>Failed to connect to SharePointSite.</exception>
<errorcode>-2147088205</errorcode>
</site>
</sites>
</errorlog>
The account used for the configuration has the following permissions:
- Global Administrator in Microsoft 365
- Domain Administrator in the on-premises environment
- SharePoint Site Collection Administrator
- SharePoint Site Owner permissions
The account can access the SharePoint site successfully through a web browser without any issues.
The problem occurs regardless of which SharePoint Online site URL we specify for the integration.
Are there any known prerequisites or configuration requirements that could cause this issue?
Any guidance would be greatly appreciated.

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