- To use Azure Files when your session hosts joined to Microsoft Entra ID, you need to assign the [Reader and Data Access](../role-based-access-control/built-in-roles.md#reader-and-data-access) Azure role-based access control (RBAC) role to both the **Azure Virtual Desktop** and **Azure Virtual Desktop ARM Provider** service principals. To learn how to assign an Azure RBAC role to the Azure Virtual Desktop service principals, see [Assign RBAC roles to the Azure Virtual Desktop service principals](service-principal-assign-roles.md). In a future update of the preview, you won't need to assign the **Azure Virtual Desktop ARM Provider** service principal.
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