Thanks gazumped, finding the business support somewhat limited if I'm honest, but will keep trying. Thanks for your help.
We have just started to use Evernote for business and have sent an invite to one of our users who had a personal account. He has attached that account to the business one but now wants to remove it and create a new account for business keeping his own as personal. If I as admin try to remove the user its says it will delete him! Is there a way to un-attach his account from business giving him back full access and not losing any data?