We are happy to announce public preview of writeback for cloud-managed remote mailboxes!

We wanted to tell you how to address the Exchange Server May 2026 vulnerability CVE-2026-42897.

We are not releasing any Exchange Server Security Updates for May 2026.

We are announcing the deprecation of Exchange ActiveSync (EAS) certificate-based authentication (CBA) directly to Exchange Online.

Announcing General Availability of Mailbox Import and Export Microsoft Graph APIs.

Configure Exchange Server SE to move your Hybrid rich coexistence scenarios to Graph API calls.

We have released a Hotfix Update for Exchange Server SE.

Exchange Online is deprecating old legacy TLS 1.0/1.1 endpoints for POP and IMAP clients.

We wanted to provide a few updates related to modernizing DNS Security in Exchange Online.

We wanted to tell you about a new Change Optics Report that is now in Public Preview.