Most RecentMost ViewedMost LikesWhy “in-place upgrade” from Exchange 2019 to Exchange SE is low risk We wanted to share information on why we view the "in-place upgrade" to Exchange SE (when available) as a "low risk" operation. Announcing Exchange 2016 / 2019 Extended Security Update program We are announcing an optional 6-month Extended Security Update (ESU) program for Exchange 2016 and 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. Introducing Exchange Online Tenant Outbound Email Limits We’re introducing new tenant-level outbound email limits (also known as the Tenant External Recipient Rate Limit or TERRL). Hotfix Released for Skype for Business Server SE (SE RTM Hotfix 2) T-1 month: Exchange Server 2016 and Exchange Server 2019 End of Support Dedicated Hybrid App: temporary enforcements, new HCW and possible hybrid functionality disruptions We are announcing enforcements to move customers along to using the dedicated hybrid app. Introducing MTA-STS for Exchange Online We have been validating our implementation of the MTA-STS standard and are now pleased to announce support for MTA-STS for all outgoing messages from 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) starting March 2026. 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.
