We are announcing General Availability (GA) of Sending from Email Alias in Exchange Online.  

We have released a V2 of September 2026 Security Updates for Exchange Server SE. Exchange Server 2019 and 2016 ESU updates only.  

EWS deprecation in Exchange Online is starting today. Learn the details of what happens next.  

We wanted to let you know that you should update your Exchange Online PowerShell module over the next several months.  

We wanted to discuss how upcoming Exchange Online EWS retirement impacts our hybrid customers and cross-org sharing scenarios.  

We have released Security Updates for Exchange Server SE. Exchange Server 2019 and 2016 ESU updates only.  

Expanded Outlook client support for Exchange Server AD FS Modern Authentication is here!  

We wanted to provide additional guidance on how admins should use the EWSAllowedAppIDs allow list during EWS deprecation.  

Customers still using Exchange 2016 or 2019 should read this update about oldest version of Exchange Server allowed to send email to Exchange Online over the...

We wanted to ask how you use ObjectGuid, SamAccountName, and DistinguishedName in Exchange Online.  

We wanted feedback about Exchange Server on-premises to different online org Free/Busy sharing, after EWS retirement.  

We wanted to share some tips on how to test EWSAllowedAppIDs (EWS AppID allow list).  

We wanted to show Administrators how recent mailbox quota changes for Microsoft 365 Business SKUs will apply to their users.

We wanted to discuss why we are somewhat late with releasing Exchange SE CU1.  

We have released Security Updates for Exchange Server SE. Exchange Server 2019 and 2016 ESU updates only.  

We wanted to provide information related to migration of existing Exchange Online Organization Relationships to the new sharing model.  

Writeback for cloud-managed remote mailboxes is now Generally Available!  

We wanted to provide a reminder that Exchange 2016 and 2019 ESU program ends in October 2026.  

We have released Security Updates for Exchange Server SE. Exchange Server 2019 and 2016 ESU updates only.  

We wanted to announce cross-tenant Message Recall in Exchange Online!  

We wanted to tell you that we will be retiring OWA Light in Exchange Server.  

We wanted to share details about the EWSAllowedAppIDs, to help you manage retirement of EWS applications in Exchange Online.  

We have released Security Updates for Exchange Server SE. Exchange Server 2019 and 2016 ESU updates only.  

Here are some tips on how to learn more about resource mailbox use.  

How to go about replacing IIS SMTP virtual server with Exchange Edge Transport.

We are happy to announce public preview of writeback for cloud-managed remote mailboxes!  

We wanted to tell you how to address the Exchange Server May 2026 vulnerability CVE-2026-42897.  

We are not releasing any Exchange Server Security Updates for May 2026.  

We are announcing the deprecation of Exchange ActiveSync (EAS) certificate-based authentication (CBA) directly to Exchange Online.  

We have released a Hotfix Update for Exchange Server SE.  

Configure Exchange Server SE to move your Hybrid rich coexistence scenarios to Graph API calls.

Announcing General Availability of Mailbox Import and Export Microsoft Graph APIs.  

Exchange Online is deprecating old legacy TLS 1.0/1.1 endpoints for POP and IMAP clients.  

We wanted to tell you about a new Change Optics Report that is now in Public Preview.  

We created a Period 2 ESU for Exchange customers who need extra time to migrate to Exchange SE.  

We are not releasing any Exchange Server Security Updates for April 2026.  

High Volume Email reached GA!  

We are announcing upcoming changes to what message properties can be changed using Graph API.  

Exchange Server is 30 years old!  

Microsot Purview team is looking for feedback on Priority Cleanup improvements.  

Just a quick note mentioning a release of AI‑powered troubleshooter for Microsoft Purview Data Lifecycle Management.  

We wanted to announce SMTP DANE & MTA STS Connector Modes in Exchange Online.  

We are not releasing any Exchange Server Security Updates for March 2026.  

We wanted to share some tips on how to find out details of EWS usage in your tenant.  

We’re excited to share that Multi-Geo In-Region Routing reached General Availability in December 2025.  

Exchange Online PowerShell -Credential parameter will be deprecated soon.  

We have released Security Updates for Exchange Server SE. Exchange Server 2019 and 2016 ESU updates only.  

We wanted to provide an update on Exchange Online EWS deprecation.  

We wanted to let you know about upcoming changes to Exchange Online message moderation.