Can i move on the client from workgroup to domain?
Domain join (forum)
https://www-secure.symantec.com/connect/forums/how-do-you-use-system-configurations-join-domain
Check it
https://www-secure.symantec.com/connect/articles/adding-computer-domainou-deployment-7x-0
--Edit--
https://www-secure.symantec.com/connect/blogs/adding-computer-domain
Incase above comment not be assist you. Then find your own other thread where Igor Perevozchikov provide you the snapshot which is the answer of your this query. You can use the same step to update in domain.
https://www-secure.symantec.com/connect/forums/modify-hostname