According to the Intune alerts you may run into issues when using Windows Phone 8.1, Microsoft Intune together with ADFS for device registration and authentication on your own Active Directory domain instead of directly in Azure Active Directory. Let’s have a look.
If you use ADFS for on-premises device registration you may have configured a setting called DeviceAuthenticationEnabled to be enabled in the ADFS global authentication policy. Because of this setting users with a Windows Phone cannot authenticate while accessing the Company Portal. Users will be redirected to the Sign In button on the Windows Phone every time you supply your UPN. The redirection to the AD FS logon screen will not happen.