Most RecentMost ViewedMost LikesIPv6 updates for Exchange Online Microsoft has recently introduced several key updates to IPv6 traffic for Exchange Online. Introducing PS.MTA-STS: a PowerShell module to enhance mail flow security with MTA-STS Learn how to use this open-source module to configure and test MTA-STS for your Exchange Online domains in a few steps. Announcing General Availability of Inbound SMTP DANE with DNSSEC for Exchange Online Today, we are excited to announce the General Availability of Inbound SMTP DANE with DNSSEC! Released: March 2024 Exchange Server Security Updates We have released Security Updates for Exchange Server 2016 and Exchange Server 2019. Retirement of RBAC Application Impersonation in Exchange Online We wanted to announce deprecation plans for ApplicationImpersonation role in 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) in September 2025. Announcing OAuth 2.0 Client Credentials Flow support for POP and IMAP protocols in Exchange Online Today, we’re excited to announce the availability of OAuth 2.0 authentication via client credentials grant flow for the POP and IMAP protocols for accessing Exchange Online mailboxes. How to pause throttling and blocking of out-of-date on-premises Exchange Servers We wanted to share how totemporarily pause throttling and blocking of out-of-date on-premises Exchange Servers, if they are sending email to Exchange Online. Throttling and Blocking Email from Persistently Vulnerable Exchange Servers to Exchange Online As we continue to enhance the security of our cloud, we are going to address the problem of email sent to Exchange Online from unsupported and unpatched Exchange servers. Announcing Client Credential Flow for SMTP AUTH in Exchange Online We are excited to announce support of Client Credential Flow (CCF) for SMTP AUTH in Exchange Online.
