Office 365 Namespace Requirements

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	Autodiscover.Office365.Company.com	Autodiscover service for Outlook clients migrated to O365

Written by Daniel Kenyon-Smith