Hello Thomas,
Cloud Volumes ONTAP is service that is available in Azure that allows you to create shares that can be accessed not only over SMB/ CIFS, but also via the NFS protocol.
The preferred method for authentication of applications in Azure is through Azure Active Directory.
It is a cloud-based identity as a service offering from Azure that can be integrated with a wide variety of applications hosted in the cloud as well as in your corporate network.
Please read this blog:
https://cloud.netapp.com/blog/azure-smb-server-message-block-in-the-cloud-for-azure-files
On the other hand from Microsoft perspective login to Azure AD with SSO (Windows Hello) is supported.
Regards,
Aleksandar