Azure VM hosted application Authentication using On-Premise Active Directory

Hi,

I have a .NET 2.0 application that I have migrated to run on IIS in an Azure VM. The application is normally hosted on servers in a local domain and authenticated using Windows Basic Authentication that checks against the on-premise Active Directory.

My question is: How can I get the application to still authenticate to on-premise AD without synchronizing with Azure AD?

Any help or suggestions would be appreciated.