Hey everyone! I'm currently trying to set up a Hyper-V Failover Cluster on Windows Server 2025 in a test environment. The Active Directory is set up with a basic configuration, and I have two nodes for this cluster. However, when I try to validate the configuration using the wizard on hyperv01, I can add that server without issues, but I get a permission error when attempting to add hyperv02. It says, "You do not have administrative privileges on the server 'hyperv02'." Additionally, I can't connect from hyperv01 to hyperv02 using the command Enter-PSSession hyperv02, which returns an access denied error. This issue seems specific to Windows Server 2025 since I had no problems creating a validation with Windows Server 2019 nodes. Any insights would be appreciated!
3 Answers
It sounds like you might need to ensure your user account is in the local administrators group on both hyperv01 and hyperv02. Since you're using a Domain Admin account, it should generally have the right privileges, but it's worth double-checking the local configurations.
I ran into a similar issue, but it turned out to be related to the template I used for the Windows Server 2025 installation. The sysprep didn't run correctly, and both nodes ended up with the same machine GUID. I had to reinstall one of the servers, and that fixed the problem!
Just a heads up, setting up a failover cluster with two vastly different versions of Windows Server (like 2019 and 2025) isn't usually supported unless it's for a temporary rolling upgrade. Are you sure both nodes are running Windows Server 2025?
Actually, I want to create the cluster using both servers on Windows Server 2025, not mixing in the older version.
Yeah, both Hyper-V servers are part of AD, and I've confirmed that the Domain Admins group is included in the local admin groups on both servers. I'm running the validation with the domain admin account, but still no luck.