Hybrid Fabrikam
On Premises Contoso
On Premises
User Ben
Client Access
Server
Microsoft
Federation
Gateway
Exchange
Online
Mailbox
Server
CLoud User
Ted
On-premises
Exchange
Ted@Fabrikam.c
om
Ben
Via AutoDiscover and
autodiscover for
Ted@fabrikam.mail.onmicroso
ft,com we hit the endpoint on-
premises
Free Busy is returned
Requirements:
1. Sync GAL
2. Multiple org relationships are
needed
3. Potentially we need a service
namespace if you want to
control mail flow
