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”.