To transfer a domain or several domains from one user account to another please follow the following:-
1) Login to Plesk control panel
2) Select the Domains shortcut in the navigation pane. Alternatively, you can select
the Clients shortcut in the navigation pane and click the required client name.
3) Select the check boxes corresponding to the domains you wish to transfer and click
Assign New Domain Owner.
4) Select the destination account you want to transfer selected domains to and click
Next >>.
5) Parallels Plesk Panel will check if the destination client account can provide the
appropriate amount of resources for the transferred domains to function properly.
If the destination client account does not have the resources to accommodate the
new domains, the lacking resources will be highlighted. To allocate the required
amount of resources to the destination client account, go to
Clients > client name > Resource Usage (in the Statistics group), adjust the
amount of resources available to the user accordingly, and start the domain
transfer procedure again.
You can also choose IP addresses for transferred domains by selecting the destination
IP address from the New IP address menu corresponding to the required domain.
6) Click Finish to complete the procedure.