I have just finished updating our cluster nodes from Windows server 2016 to 2019.
On 2 of our clusters there were no issues, but on a 3rd I am having the following issue.
When O go to update the functional level, I get this.
Update-ClusterFunctionalLevel : You do not have administrative privileges on the cluster.
I am a domain admin, in the local admins group on each node, and have full cluster access.
I can run any other administrative powershell cluster command without issue, and can fully admin via the GUI, but running the command Update-ClusterFunctionalLevel gives the no privileges error.
If I ask my other admin to run it, he gets the same.
If I create a net new AD account, assign it local admin on each node, and grant-cluster access full , that account also get it.
I opened a MS support ticket, but after 10 days I have still yet to get a call back. I even called back in (Sev-B = 4 hours...) and they said, yes I am still in the queue - wth....)
Anyway, I am assuming it is likely a bad registry entry, or something messed up on an AD object perhaps, but not sure where to look.