Most RecentMost ViewedMost LikesUpdated Exchange Online SMTP AUTH Basic Authentication Deprecation Timeline We wanted to provide the updated Exchange Online SMTP AUTH Basic Authentication Deprecation Timeline. Message 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. Trust DigiCert Global Root G2 Certificate Authority to Avoid Exchange Online Email Disruption We wanted to let you know of an upcoming change in certificates trusted by Exchange Online. 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). Introducing more control over Direct Send in Exchange Online Read about a new feature that gives you more control over Direct Send in Exchange Online. 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. Exchange Online canceling the Mailbox External Recipient Rate Limit The Mailbox External Recipient Rate Limit in Exchange Online is being canceled. 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. High Volume Email: Continued support for Basic Authentication & other important updates This announcement provides several important updates for High Volume Email. Updates to High Volume Email (HVE) Public Preview We are excited to share some updates to High Volume Email (HVE) Public Preview.