Many organizations have been using certificate based authentication for Exchange Online while the feature was in preview. Today, we are excited to announce that the feature is generally available in Office 365 Enterprise, Business, Education, and Government plans. For more details, please reference our preview post which has been modified to reflect this announcement. As always, we look forward to hearing your suggestions and feedback!
Tyler LenigProgram Manager
Office 365
Updated Jul 01, 2019
Version 2.0The_Exchange_Team
Microsoft
Joined April 19, 2019
Exchange Team Blog
You Had Me at EHLO.