Customizing your Office 365 Sign-In Page
Microsoft has recently released Azure Active Directory Premium – an enhanced version of the Cloud Identity Management solution.
One of the features that this unlocks is the ability to customize the branding of your users Office 365 Web Based sign in experience.
Before you can get started you need to buy Azure AD Premium Licences (At the time of writing you can get a 90 day free trial). To get set up with Azure Active Directory Premium please follow these instructions.
To brand your sign-in screen sign into the Azure Management Portal as an administrator and perform the following steps.
Select Active Directory from the Left Hand Menu and click on the directory you wish to customize.
Select the Configure tab, and then select Customize Branding.
Change the settings you wish to customize and upload any logos.
Click the Save button.
Within the next hour, your users will see a customized login page after they type in their sign-in name!