I have hosted my email on Google Apps and was trying to move it to Windows Live Domains. However, when I tried to create my email address as me@mydomain.com, I received the error The requested account name is already in use or was used in the past and has not been through the required waiting period to re-use.  Is there a restriction on Windows Live Domains to create a short alias? As I have already been using this email address, I really need to create it on Windows Live Domains or not make the switch at all. 
Email Aliases on Windows Live Domains for Custom Domains
windows live