You can remove a host from a cluster in a workload domain through the Workload Domains page in SDDC Manager UI.
When a host is removed, the vSAN members are reduced. Ensure that you have enough hosts remaining to facilitate the configured vSAN availability. Failure to do so might result in the datastore being marked as read-only or in data loss.
Prerequisites
Procedure
Results
The host is removed from the workload domain and added to the free pool.
What to do next
Clean up the host so that you can use it again. See Clean up a Decommissioned Host Using the Direct Console User Interface.