A list of useful resources which help to understand how ADFS works with Office 365, explain how to configure single sign-on for Office 365 with ADFS, explain how to customize ADFS UI, configure client access policy and claim rules
How Does ADFS Work With Office 365
Plan for and deploy ADFS for use with single sign-on in Office 365
Complete setup details for federated identity access from on-premise AD to Office 365
The Office 365 Client Access Policy Builder for ADFS
Useful Customizations to ADFS when Deploying SSO with Office 365