Office 365 SSO: Configuring multiple Office 365 tenants to use a single AD FS instance
Q: Can multiple Office 365 tenants use a single AD FS instance to provide SSO?
A: Yes
Overview
- Office 365 tenant 1 is configured with the domain contoso.com
- Office 365 tenant 2 is configured with the domain sub.contoso.com
- Single Active Directory Forest with multiple UPNs configured (contoso.com and sub.contoso.com)
- Single AD FS instance including an AD FS Proxy/Web Application Proxy published with the name sts.contoso.com
- Two instances of Azure ADConnect configured with container filtering to ensure users are only synchronised to a single tenant
Configuring SSO
The Federation Trust for Tenant 1 is configured by establishing a Remote PowerShell session (with the Azure Active Directory Module loaded) and running the standard ‘Convert-MsolDomainToFederated’ cmdlet:
[code]Convert-MsolDomainToFederated -DomainName contoso.com… [Keep reading] “Office 365 SSO: Configuring multiple Office 365 tenants to use a single AD FS instance”