Office 365 + Sharepoint Login page Branding + external user

Hi,

I have found, way to branding login page in Office-365 on this link
http://technet.microsoft.com/en-us/library/dn532270.aspx 

Is this branding is possible to log-in in office 365 share point  of Organization accounts  and as well as external user also log-in through custom branding log-in page?

 i have required custom branding for office 365 login page for external user??

please suggest me to full fill my requirement.

Thanks in advance