Problems connecting to Sharepoint

Hi does someone has a valid documentation on this ?
I’m still unable to connect and the Nextcloud Documentation has not the information I need.

I’m Using M365 (Office365) and Nextcloud 20.0.4 and did the following:

And getting these errors

2021-07-27 11_08_22-Window

Using latest Nextcloud.

The “Unmanaged Device” Option is unfortunately missing in Sharepoint Admin Center cause we “only” have a business premium standard Licence…