This post tells you the different ways to move the ESX host between the clusters .There are 2 different ways to move the ESX hosts between the clusters.
Method 1: Move ESX Host from cluster by placing the host in maintenance Mode
1. Login to the vCenter server. When you try to Move the host between cluster or try to remove the host from cluster, you will get the below error.
2. Place the ESX host in Maintenance Mode and Click OK to migrate virtual machine out of host or Migrate the VM’s manually before placing host into maintenance mode
3.Drag and Drop the ESX host from the cluster 1 to cluster 2
Method 2 : Move ESX host from cluster without Placing into Maintenance Mode
1. Login to the vCenter server
2. Right Click the ESX host and Disconnect ESX host from VC
3. Remove the ESX host from VC temporarily. Logout and connect back to VC, if you face any hang in VC
4.Re-add the host in the new cluster
Thanks for Reading !!!!!