Azure Files Deployment

Greg 0 Reputation points

Smaller environment with on-prem AD that sync's to Office 365.

We've moved a lot of data to SharePoint Online but no one seems very happy with the performance and user experience. I'd also like to remove all on-prem servers (HV, AD & FS); move workstations to Azure AD.

Researching Azure files and thinking we should have an Azure Files sync server at the HQ office. It's a commercial construction firm where the accounting staff, marketing and other power users make extensive use of Blue Beam, Adobe products and others. The Accounting team likes to drag/drop files between their local PC and the file shares. We also have very deep file structures w/ long folder and file names. All-in under 2TB of data in play here.

First and foremost, is this a good use case for Azure Files?

I'm thinking for the guys with laptops that are out of the office a lot, we would just map their drives to File Sync Server on Windows Azure Edition. The Power users in the office we would map to the Azure Files Sync server instance in the office.

In this scenario, how frequently can updates be reflected in the cloud when files are changes on-prem or vice versa?

Any other sage advice is much appreciated.


Azure Files
Azure Files
An Azure service that offers file shares in the cloud.
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  1. Shawn Collins 615 Reputation points

    "We also have very deep file structures w/ long folder and file names."

    That's likely why you're having issues with SPO performance. SPO is meant to flatten out your architecture, not take the mess on-prem and transfer it.

    Azure Files is....meh. You're likely going to experience the same issue, it'll cost more and it'll be yet another migration.

    Was a thorough data analysis done before the migration to SPO? Can any of this be archived or better organized to help with the SPO performance?

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  2. Nehruji R 3,041 Reputation points Microsoft Vendor

    Hello Greg,

    Greetings! Welcome to Microsoft Q&A Platform.

    It sounds like Azure Files might meet your use-case. Azure Files offers fully managed file shares in the cloud that are accessible via the industry standard Server Message Block (SMB) protocol or Network File System (NFS) protocol. Azure file shares can be mounted concurrently by cloud or on-premises deployments. Azure Files SMB file shares are accessible from Windows, Linux, and macOS clients. Azure Files NFS file shares are accessible from Linux or macOS clients.

    Azure Files supports identity-based authentication over Server Message Block (SMB) through on-premises Active Directory Domain Services (AD DS) and Azure Active Directory Domain Services (Azure AD DS).

    refer this planning doc for more detailed guidance -,

    While Azure Files provides good performance, consider the latency introduced by accessing files over the internet. Sync Frequency- Updates between on-premises and cloud are near real-time, but the exact frequency depends on your sync settings.

    For Laptops (Out of Office): Map drives directly to Azure Files from laptops. Users can access files even when not in the office. Changes made on laptops will sync to Azure Files based on your sync schedule.

    Power Users (In the Office): Map drives to the Azure Files Sync server instance in the office and changes made in the office will sync to Azure Files and vice versa.

    Azure File Sync uses a sync interval (default is 24 hours) to replicate changes between on-premises and cloud and you can adjust the sync interval based on your needs. For more frequent updates, consider reducing the interval. Note that changes are detected and synced incrementally, so only modified files are transferred.

    If you make a change to the cloud endpoint (Azure file share) directly, changes first need to be discovered by an Azure File Sync change detection job. A change detection job is initiated for a cloud endpoint only once every 24 hours. For more information, see Azure Files frequently asked questions.

    Changes made to the Azure file share by using the Azure portal or SMB are not immediately detected and replicated like changes to the server endpoint. Azure Files does not yet have change notifications or journaling, so there's no way to automatically initiate a sync session when files are changed. On Windows Server, Azure File Sync uses Windows USN journaling to automatically initiate a sync session when files change.

    To detect changes to the Azure file share, Azure File Sync has a scheduled job called a change detection job. A change detection job enumerates every file in the file share, and then compares it to the sync version for that file. When the change detection job determines that files have changed, Azure File Sync initiates a sync session. The change detection job is initiated every 24 hours. Because the change detection job works by enumerating every file in the Azure file share, change detection takes longer in larger namespaces than in smaller namespaces. For large namespaces, it might take longer than once every 24 hours to determine which files have changed.

    To immediately sync files that are changed in the Azure file share, the Invoke-AzStorageSyncChangeDetection PowerShell cmdlet can be used to manually initiate the detection of changes in the Azure file share. This cmdlet is intended for scenarios where some type of automated process is making changes in the Azure file share or the changes are done by an administrator (like moving files and directories into the share). For end user changes, the recommendation is to install the Azure File Sync agent in an IaaS VM and have end users access the file share through the IaaS VM. This way all changes will quickly sync to other agents without the need to use the Invoke-AzStorageSyncChangeDetection cmdlet. To learn more, see the Invoke-AzStorageSyncChangeDetection documentation.

    We are exploring adding change detection for an Azure file share similar to USN for volumes on Windows Server. Help us prioritize this feature for future development by voting for it at Azure Community Feedback.

    Assign share-level permissions :

    Configure directory and file-level permissions over SMB :

    Similar thread for reference -

    Hope this answer helps! Please let us know if you have any further queries. I’m happy to assist you further.

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