Enabling Modernauth in EXO in a Hybrid environment?
I've been planning to enable ModernAuth in o365 however the tenant has both a hybrid exchange and SFB deployment.
I want to enable this on EXO by using Set-OrganizationConfig -OAuth2ClientProfileEnabled $true as documented here: https://docs.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/enable-or-disable-modern-authentication-in-exchange-online
However, I just came across this article which mentions enabling Modernauth on the onprem exchange and SFB environments. https://docs.microsoft.com/en-us/office365/enterprise/hybrid-modern-auth-overview
Is this necessary? Will I have any issues simply enabling this on Exchange online without touching the onprem environments?
Thanks in advance if anyone has the time to advise
Posted Jan 30, 2020, 2:22 PM UTC
If it’s not enabled for EXO already then def enable it. It won’t affect hybrid connectivity. But you should make sure your clients support modern auth.
Hybrid modern auth can be enabled if you want to extend oauth for clients to on prem mailboxes as well but is not a requirement for you to use MA in EXO
Thank you :)