ADFS migration from 2016 OS to 2025 OS .

naveen 0 Reputation points
2026-10-07T09:58:52.7+00:00

We have an ADFS 2016 farm (10.0.14393.6078, Farm Behavior Level 3) using a gMSA service account. We are trying to add an ADFS 2025 node (10.0.26100.33158) using Add-AdfsFarmNode. HTTP SPNs are correctly registered and visible in Active Directory, yet Add-AdfsFarmNode fails with "There were no SPNs set on the service account". Is direct Windows Server 2025 federation server expansion into a Windows Server 2016 ADFS farm supported, and are there known issues with gMSA-based farms?

Microsoft Security | Active Directory Federation Services
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