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# How to use DFS Namespaces with Azure Files
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[Distributed File Systems Namespaces](/windows-server/storage/dfs-namespaces/dfs-overview), commonly referred to as DFS Namespaces or DFS-N, is a Windows Server server role that's widely used to simplify the deployment and maintenance of SMB file shares in production. DFS Namespaces is a storage namespace virtualization technology, which means that it enables you to provide a layer of indirection between the UNC path of your file shares and the actual file shares themselves. DFS Namespaces works with SMB file shares, agnostic of where those file shares are hosted. It can be used with SMB shares hosted on an on-premises Windows File Server with or without Azure File Sync, Azure file shares directly, SMB file shares hosted in Azure NetApp Files or other third-party offerings, and even with file shares hosted in other clouds.
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[Distributed File Systems Namespaces](/windows-server/storage/dfs-namespaces/dfs-overview), commonly referred to as DFS Namespaces or DFS-N, is a Windows Server server role that's used to simplify the deployment and maintenance of SMB file shares in production. DFS Namespaces is a storage namespace virtualization technology, which means that it enables you to provide a layer of indirection between the UNC path of your file shares and the actual file shares themselves. DFS Namespaces works with SMB file shares, agnostic of where those file shares are hosted. It can be used with SMB shares hosted on an on-premises Windows File Server with or without Azure File Sync, Azure file shares directly, SMB file shares hosted in Azure NetApp Files or other third-party offerings, and even with file shares hosted in other clouds.
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At its core, DFS Namespaces provides a mapping between a user-friendly UNC path, like `\\contoso\shares\ProjectX` and the underlying UNC path of the SMB share like `\\Server01-Prod\ProjectX` or `\\storageaccount.file.core.windows.net\projectx`. When the end user wants to navigate to their file share, they type in the user-friendly UNC path, but their SMB client accesses the underlying SMB path of the mapping. You can also extend this basic concept to take over an existing file server name, such as `\\MyServer\ProjectX`. You can use this capability to achieve the following scenarios:
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- Provide a migration-proof name for a logical set of data. In this example, you have a mapping like `\\contoso\shares\Engineering`that maps to `\\OldServer\Engineering`. When you complete your migration to Azure Files, you can change your mapping so your user-friendly UNC path points to `\\storageaccount.file.core.windows.net\engineering`. When an end user accesses the user-friendly UNC path, they will be seamlessly redirected to the Azure file share path.
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- Provide a migration-proof name for a logical set of data. For example, you can mapp `\\contoso\shares\Engineering` to `\\OldServer\Engineering`. When you complete your migration to Azure Files, you can change the mapping to `\\storageaccount.file.core.windows.net\engineering`, such that when an end user accesses the user-friendly UNC path, they are seamlessly redirected to the Azure file share path.
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- Establish a common name for a logical set of data that is distributed to multiple servers at different physical sites, such as through Azure File Sync. In this example, a name such as `\\contoso\shares\FileSyncExample` is mapped to multiple UNC paths such as `\\FileSyncServer1\ExampleShare`, `\\FileSyncServer2\DifferentShareName`, `\\FileSyncServer3\ExampleShare`. When the user accesses the user-friendly UNC, they are given a list of possible UNC paths and choose the one closest to them based on Windows Server Active Directory (AD) site definitions.
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# [Portal](#tab/azure-portal)
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On a Windows DNS server, open the DNS management console. You can find this by selecting the **Start** button and typing **DNS**. Navigate to the forward lookup zone for your domain. For example, if your domain is `contoso.com`, the forward lookup zone can be found under **Forward Lookup Zones** > **`contoso.com`** in the management console. The exact hierarchy shown in this dialog depends on the DNS configuration for your network.
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Right-click on your forward lookup zone and select **New Alias (CNAME)**. In the resulting dialog, enter the short name for the file server you're replacing (the fully qualified domain name will be auto-populated in the textbox labeled **Fully qualified domain name**). In the textbox labeled **Fully qualified domain name (FQDN) for the target host**, enter the name of the DFS-N server you have set up. You can use the **Browse** button to help you select the server if desired. Select **OK** to create the CNAME record for your server.
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Right-click on your forward lookup zone and select **New Alias (CNAME)**. In the resulting dialog, enter the short name for the file server you're replacing (the fully qualified domain name is auto-populated in the textbox labeled **Fully qualified domain name**). In the textbox labeled **Fully qualified domain name (FQDN) for the target host**, enter the name of the DFS-N server you have set up. You can use the **Browse** button to help you select the server if desired. Select **OK** to create the CNAME record for your server.
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