Please find a list of typical namespaces that are required when setting up and installing Active Directory Federation Services (ADFS) 2.0 and rich coexistence/hybrid with Office 365
Namespace
Value
Description
On premise SMTP Namespace
Company.com
On-premise SMTP namespace
Online Tenant Namespace
Company.onmicrosoft.com
Name of the namespace given by Microsoft when the tenant is created
Service Namespace
Office365.Company.com
SMTP mail routing namespace for determining where the mailbox is located.
Delegation Namespace
Exchangedelegation.Company.com
Federation delegation to the Microsoft Federation Gateway. Allows sharing of free/busy between external organisations
Federation Service Name
Federation.Company.com
ADFS name that O365 will redirect clients to
Autodiscover
Autodiscover.Company.com
Autodiscover service for Outlook client on-premise
Autodiscover.Office365.Company.com
Autodiscover service for Outlook clients migrated to O365
Written by Daniel Kenyon-Smith