Most RecentMost ViewedMost LikesUpdate on Client Access Rules Deprecation in Exchange Online We wanted to provide an update on deprecation of Client Access Rules (CARs) in Exchange Online. Re-release of November 2024 Exchange Server Security Update packages Today we are re-releasing the November 2024 SUs for Exchange Server. Exchange Online to introduce External Recipient Rate Limit Today, we are announcing that, beginning in January 2025, Exchange Online will begin enforcing an external recipient rate limit of 2000 recipients in 24 hours. Released: November 2024 Exchange Server Security Updates We have released Security Updates for Exchange Server 2016 and Exchange Server 2019. Critical Update: ApplicationImpersonation RBAC Role Deprecation in Exchange Online We wanted to share an update on the ApplicationImpersonation RBAC Role Deprecation in Exchange Online. Retirement of RBAC Application Impersonation in Exchange Online We wanted to announce deprecation plans for ApplicationImpersonation role in Exchange Online. Update on Exchange Server ADFS Modern Authentication support We are pleased to provide an update regarding Exchange Server ADFS Modern Authentication support. 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. Updates on Servicing Exchange Server 2019 We wanted to provide an update on servicing Exchange Server 2019. Upgrading your organization from current versions to Exchange Server SE We wanted to provide additional guidance and FAQ for preparing your organizations for Exchange Server SE release.
