Review the CurrentFarmBehavior and FarmNodes.Īfter you've collected the current federation farm information, you're ready to begin the upgrade process. Run the following PowerShell command to return the current FBL and farm node information. Sign in to your federation server and open an elevated PowerShell session. Now that you understand the purpose of the FBL and have completed the prerequisites, you're ready to review your current FBL. Upgrading the FBL creates a new AD FS configuration database. The following table lists the possible FBL values and configuration database names by Windows Server version. If your organization is looking to test the new features prior to raising the FBL, you need to deploy a separate farm. When you have multiple Windows Server versions operating in the same farm at the FBL value of the lowest version, your farm is "mixed." However, you can't take advantage of the features of the later versions until you raise the FBL. The farm operates at the same FBL as the existing node(s). You can join an AD FS server of a later version to a farm with a lower FBL. Leaving AD FS in a mixed mode state might cause issues with the farm.īack up your AD FS configuration and federation servers.īy default, the FBL in a new AD FS farm matches the value for the Windows Server version of the first farm node installed. It's not recommended to operate a mixed mode state for an extended period of time. Have a defined time frame planned for completion. For more information about upgrading your domain, see Upgrade domain controllers to a newer version of Windows Server. If you're upgrading to in Windows Server AD FS 2019 or later, the AD schema must be at least 88. If you're upgrading to AD FS in Windows Server 2016 or later, the farm upgrade requires the AD schema to be at least level 85. For more information, see Working with Web Application Proxy. If you're also using Windows Server Web Application Proxy, deploy the target Windows Server version on a new computer, apply all Windows Updates, and install the Remote Access server role and Web Application Proxy role service. For more information, see Add a federation server to an existing federation server farm. Prerequisitesīefore you can upgrade the farm behavior level, you must meet the following prerequisites:ĭetermine which version of Windows Server to upgrade to.ĭeploy the target Windows Server version on a new computer, apply all Windows Updates, and install the Active Directory Federation Service server role. Features of the newer Windows Server AD FS versions can't be configured or used. The FBL is farm-wide setting that determines the features the AD FS farm can use.Īdministrators can add new federation servers to an existing Windows Server farm in "mixed mode." Mixed mode operates at the same farm behavior level as the original farm to ensure consistent behavior. Beginning in Windows Server 2016, the farm behavior level (FBL) was introduced to AD FS. In this article, you learn how to upgrade the farm behavior level for Active Directory Federation Services (AD FS) by using Windows Internal Database (WID). Instead of upgrading to the latest version of AD FS, Microsoft highly recommends migrating to Microsoft Entra ID.įor more information, see Resources for decommissioning AD FS
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