SharePoint Online Backend v1.15.0 Configuration

Hello,
unfortunately there is still no complete documentation on how to integrate SharePoint Online (M365) with Nextcloud.

Maybe someone has another idea, as the previous instructions didn’t help.

The following configuration is set:

Host: https://tenant.sharepoint.com/sites/site collection
Document library: sites/site collection/document library/shared%documents/forms/allitems.aspx
NTLM Authentication: disabled
Authentication: All tested, none works

This error is displayed at the user folder:

Is there something else that needs to be enabled somewhere else?

Many thanks in advance.

Regards

Daniel

Update:

I figured out that the authentication is failing due to security defaults:


Any ideas? Disable is no option.