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I have a fully licensed ESXi 6.5 VM host that has 3 VMs running. I am trying to add it to a new Cluster (HA, EVC, DRS off) that I have created on a vCenter 6.7 Update 1 VCSA, but it tells me the host needs to go into Maintenance mode before it can be moved? I always thought it was possible to add a host with powered on VMs to a cluster?

I tried adding it to the Datacenter instead of cluster, and there is no mention of the need to be powered off.

Also, the option when right-clicking the Cluster is Add Hosts... but on the datacenter it is Add Host...

I recently rebuilt this VCSA from scratch as it was a Windows vCenter that horribly broke (VMware Support unable to resolve issues). Adding the hosts from the old vCenter to the new one, was no problem.

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