We're using O365 Business Essentials plans and a couple of days ago I found a button "Customize Branding" (or similar - I use the german UI). I used it to customize the Login page and this works just fine.
As we have created CNAMES to the http://portal.office.com URL, I'd be intrested in the URL to get directly to the branded login page.
For Outlook Online this is possible via http://Outlook.com/my-domain.tld but for the portal this does not work. What is the URL for the portal?
For the portal login page I always get the standard branding and the customized only after entering the username.
Kind regards, Andreas