Most RecentMost ViewedMost LikesMessage Trace Support Using Graph API is now in Public Preview We are happy to announce that the Message Trace support using Graph API is now in Public Preview. Announcing General Availability (GA) of the New Message Trace in Exchange Online We are excited to announce the GA of the new Message Trace in the Exchange admin center (EAC) in Exchange Online. Introduction to Cross-Tenant Mailbox Migrations We wanted to share more detail around the cross-tenant mailbox migration process. Demystifying Exchange Online Mailbox Quotas We wanted to do a deeper dive into various types of mailbox quotas in Exchange Online. Update to EWS Access for Kiosk / Frontline Worker Licensed Users We wanted to provide an update on EWS access for Kiosk / Frontline Worker licensed users. Exchange Online canceling the Mailbox External Recipient Rate Limit The Mailbox External Recipient Rate Limit in Exchange Online is being canceled. Cloud-Managed Remote Mailboxes: Now Generally Available! We are happy to announce General Availability of cloud-managed Remote Mailboxes. Exchange Online to retire Basic auth for Client Submission (SMTP AUTH) Today, we are announcing that Exchange Online will permanently remove support for Basic authentication with Client Submission (SMTP AUTH) starting March 2026. Auto-Archiving for Exchange Online We are happy to announce the time-based archiving feature for Exchange Online users with archives. Limiting Onmicrosoft Domain Usage for Sending Emails We are announcing that all Exchange Online customers who send external email should start switching to custom (aka vanity) domain names.
