How can I move an account from one home partition to another?
If you have multiple /home partitions on your server and want to move an account between them, you can use the Rearrange an Account function within WHM to move the account.
For further information please see the documentation for Rearrange an Account: cPanel Docs: Rearrange an Account
There is no method in WHM to move multiple accounts to a different home partitions, but there is a feature request located at the link below.
cPanel Feature Requests: Rearrange Accounts for Multiple Accounts To New Partition