If you run file shares in Microsoft Azure and you have kept an on-premises Active Directory domain controller alive just so people can log in to those shares, that requirement is gone. Azure Files now supports authentication using only Microsoft Entra ID, the cloud identity service that replaced Azure Active Directory. That means you can retire legacy infrastructure, cut the time your IT team spends maintaining domain sync, and let people access files from anywhere without a VPN.
What this changes for Ontario businesses using Azure
Until now, if you wanted secure file sharing in Azure with per-user permissions, you had two choices. You could keep an on-premises domain controller running and sync it to the cloud using Entra Connect, or you could pay for a managed domain in Azure. Both options add cost, complexity, and maintenance overhead.
The new Entra-Only authentication removes that requirement. Your team can access file shares in Azure using the same cloud identity they already use for Microsoft 365, without any domain infrastructure. Permissions work the same way they always have. You still get user-level security. You just don't need the old domain anymore.
This matters most if you have remote staff, multiple offices, or a mix of people working from home and in the office. Those users can access file shares without connecting to a VPN or relying on line-of-sight to your network. Authentication happens directly through Microsoft Entra ID, and the file share checks their identity before granting access.
When this is worth doing
If you are already running Azure Files and you are still maintaining a domain controller mostly for file access, this is worth a conversation with your IT provider. You can move to cloud-only authentication, retire the domain controller, and simplify your environment. The cost savings come from not paying for domain sync infrastructure and not spending staff time managing it.
If you are planning to move file servers into Azure and you were dreading the domain sync setup, that step is now optional. You can deploy Azure Files with Entra-Only authentication from the start and skip the hybrid identity layer entirely.
If you are running virtual desktops in Azure Virtual Desktop and using FSLogix profile containers, this is a cleaner way to store those profiles. Microsoft confirmed that FSLogix profile containers can be stored on Azure Files Premium and accessed using Microsoft Entra-based users via Kerberos. That means you can run a fully cloud-native virtual desktop environment without hybrid identity dependencies.
When this does not apply
If your file shares are still on-premises and you have no plans to move them to Azure, nothing changes for you. This feature only applies to Azure Files, not to on-premises file servers.
If you use Active Directory for more than just file access, like Group Policy or line-of-business applications that require domain authentication, you still need to keep your domain running. This feature removes the requirement for Azure Files specifically, not for every workload.
If you are running a fully on-premises environment with no Azure footprint, this is not relevant. It is only worth considering if you are already using Azure or actively planning a migration.
What to do on Monday
If you are running Azure Files today and you want to explore cloud-only authentication, start by checking whether your current setup uses hybrid identity or managed domain controllers. If it does, ask your IT team or your managed IT provider whether you can migrate to Entra-Only authentication and retire the domain infrastructure.
If you are planning a file server migration to Azure in the next six to twelve months, ask your provider whether Entra-Only authentication is part of the design. It will save you time and money compared to setting up hybrid sync.
If you are running Azure Virtual Desktop or considering it, ask whether your FSLogix profiles can be stored on Azure Files with Entra-Only authentication. It is a simpler architecture than the older hybrid model and it reduces the number of moving parts you need to maintain.
If none of those apply, you can file this away. It is a good option to know about when the time comes to move file shares into the cloud, but it is not urgent unless you are already running Azure Files with hybrid identity and paying to maintain that setup.
