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Exchange Team Blog

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Tech news / industrySecurityMicrosoft blogsMicrosoft Tech Community

’05’10’15’20’25
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2,174 from 9 Feb 2004 to 21 Oct 2026
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weekly (69 in the last year)
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Latest

October 2026

  1. Exchange Online EWS application stopped working? Do this.
  2. The Change Optics Report is now Generally Available in Exchange Online
  3. Exchange servers may become unstable after installation of October 2026 Windows updates
  4. Released: October 2026 Exchange Server Security Updates
  5. Sending From Email Aliases – General Availability
  6. Released: September 2026 V2 Exchange Server Security Updates
  7. EWS Deprecation Is Here – What This Means To You
  8. Action Required: Upgrade ExchangeOnlineManagement PowerShell Module to Version 3.10.1 or Newer

September 2026

  1. Impact of Exchange Online EWS Deprecation on Hybrid Rich Coexistence and Cross-org Sharing
  2. Released: September 2026 Exchange Server Security Updates
  3. Exchange Server AD FS Modern Authentication: Expanded Outlook client support
  4. Take control of your EWSAllowedAppIDs list before EWS access changes
  5. Exchange 2016/2019: Throttling and Blocking up to the Final Public Update Baseline

August 2026

  1. Tell us how you use ObjectGuid, SamAccountName, and DistinguishedName in Exchange Online
  2. Help us shape Exchange Server on-premises to different online org Free/Busy after EWS retirement
  3. Notes from the field: testing EWSAllowedAppIDs safely
  4. Understanding the new 100 GB mailbox entitlement for Microsoft 365 Business suites
  5. Where is Exchange SE CU1 anyway?
  6. Released: August 2026 Exchange Server Security Updates
  7. Cross-tenant Free/Busy, MailTips, and Calendar Sharing are moving to Cross-Tenant Access Policy
  8. Writeback for Cloud-Managed Remote Mailboxes: Now Generally Available

July 2026

  1. Reminder: Exchange 2016 and 2019 ESU Program Ends in October 2026
  2. Released: July 2026 Exchange Server Security Updates
  3. Cross-Tenant Message Recall in Exchange Online
  4. Upcoming retirement of OWA Light in Exchange Server

June 2026

  1. Introducing EWSAllowedAppIDs: Preparing for the Final Phase of EWS Retirement
  2. Released: June 2026 Exchange Server Security Updates

May 2026

  1. How to determine which Resource Mailboxes are being actively used
  2. Replacing IIS SMTP virtual server with Exchange Edge Transport
  3. Writeback for Cloud-Managed Remote Mailboxes: Now in Public Preview
  4. Addressing Exchange Server May 2026 vulnerability CVE-2026-42897
  5. No Exchange Server Security Updates for May 2026
  6. Retirement of Direct Exchange ActiveSync Certificate-Based Authentication by End of 2026
  7. General Availability of Mailbox Import and Export Microsoft Graph APIs
  8. Update Your Exchange SE Hybrid On-premises Rich Coexistence to Graph
  9. Released: May 2026 Exchange Server Hotfix Update

April 2026

  1. Deprecating Legacy TLS and Endpoints for POP and IMAP in Exchange Online
  2. Modernizing DNS Security for Exchange Online Mail Flow
  3. Change Optics Report released into Public Preview to showcase messages impacted by future changes
  4. Announcing Period 2 Exchange 2016/2019 Extended Security Update (ESU) program
  5. No Exchange Server Security Updates for April 2026

March 2026

  1. High Volume Email reaches General Availability in Exchange Online
  2. Upcoming Breaking Changes to Modifying Sensitive Email Properties via Graph API
  3. Celebrating 30 Years of Microsoft Exchange
  4. Give Us Feedback on Faster, Simpler Data Purging for Exchange Online
  5. AI‑Powered Troubleshooting for Microsoft Purview Data Lifecycle Management now available
  6. Announcing SMTP DANE & MTA STS Connector Modes in Exchange Online
  7. No Exchange Server Security Updates for March 2026

February 2026

  1. Notes From the Field: Finding and Remediating EWS App Usage Before Retirement
  2. Multi-Geo In-Region Routing General Availability
  3. Deprecation of the -Credential Parameter in Exchange Online PowerShell
  4. Released: February 2026 Exchange Server Security Updates
  5. Exchange Online EWS, Your Time is Almost Up
  6. Streamlined Moderation Approvals, Now in All Outlook Clients

January 2026

  1. Microsoft Graph User Configuration API (preview) - now available
  2. Trust DigiCert Global Root G2 Certificate Authority to Avoid Exchange Online Email Disruption
  3. Updated Exchange Online SMTP AUTH Basic Authentication Deprecation Timeline
  4. Exchange Online Public Folder Data and Retention Questions
  5. Message Trace Support Using Graph API is now in Public Preview
  6. Demystifying Exchange Online Mailbox Quotas
  7. No Exchange Server Security Updates for January 2026
  8. Local Move Requests in Exchange Online – Why They’re Not Supported
  9. Exchange Online canceling the Mailbox External Recipient Rate Limit

December 2025

  1. Exchange Online ActiveSync Device Support Update
  2. Using ExcludeFromAllHolds to Remove Holds from Inactive Mailboxes
  3. Released: December 2025 Exchange Server Security Updates
  4. Update to EWS Access for Kiosk / Frontline Worker Licensed Users

November 2025

  1. Announcing Public Preview: Exchange Online Admin API
  2. No Exchange Server Security Updates for November 2025

October 2025

  1. Interest Survey: Copilot for Exchange Server (on-premises)
  2. Retirement Date for Office Online Server (OOS) has been Announced
  3. Cloud-Managed Remote Mailboxes: Now Generally Available!
  4. Released: October 2025 Exchange Server Security Updates
  5. Support for Exchange Server 2016 and Exchange Server 2019 ends today
  6. Exchange Online ActiveSync Certificate-based Authentication endpoint changes
  7. Active Directory schema extension issue if you use a Windows Server 2025 schema master role
  8. Auto-Archiving for Exchange Online
  9. Updates to Get-Contact and Set-Contact Cmdlets for “Contacts” Recipient Type in Exchange Online

September 2025

  1. T-1 month: Exchange Server 2016 and Exchange Server 2019 End of Support
  2. The first temporary enforcement of dedicated hybrid app use is coming on September 16
  3. Released: September 2025 Exchange Server Hotfix Updates

August 2025

  1. Limiting Onmicrosoft Domain Usage for Sending Emails
  2. Introducing Cloud-Managed Remote Mailboxes: a Step to Last Exchange Server Retirement
  3. Released: August 2025 Exchange Server Security Updates
  4. Dedicated Hybrid App: temporary enforcements, new HCW and possible hybrid functionality disruptions
  5. Direct Send vs sending directly to an Exchange Online tenant

July 2025

  1. Use GitHub Copilot to help speed up your transition from EWS
  2. Deprecation of native public folder migrations to service from very old versions of Exchange
  3. Announcing Exchange 2016 / 2019 Extended Security Update program
  4. Reduced License Count Requirement for Exchange Online Delicensing Resiliency Feature
  5. Exchange Server Subscription Edition (SE) is now available

June 2025

  1. Directory Based Edge Blocking Now Available for Public Folders & Dynamic Distribution Groups
  2. TLS Certificates in Exchange Hybrid - Common Issues & How to Fix them
  3. Announcing General Availability (GA) of the New Message Trace in Exchange Online

May 2025

  1. Released: May 2025 Exchange Server Hotfix Updates
  2. Get the status of legacy Exchange Online tokens and add-ins that use them
  3. Using PowerShell and Excel Files for Bulk Operations
  4. Give us feedback on Exchange Online Cmdlet changes and Rest API availability for Admin Scenarios
  5. Introducing Exchange Web Services (EWS) Usage Reports in Microsoft 365 Admin Center
  6. High Volume Email: Continued support for Basic Authentication & other important updates
  7. Why “in-place upgrade” from Exchange 2019 to Exchange SE is low risk
  8. Important Update to the Get-FederationInformation Cmdlet in Exchange Online

April 2025

  1. More Efficient Bulk Operations with PowerShell Parallelism
  2. Introducing more control over Direct Send in Exchange Online
  3. Exchange Server Security Changes for Hybrid Deployments
  4. Released: April 2025 Exchange Server Hotfix Updates
  5. Retirement of cloud archive mailbox access by using Exchange Server on-premises OWA
  6. T-6 months: Exchange Server 2016 and Exchange Server 2019 End of Support
  7. More licensing and pricing information for Exchange SE is now available
  8. Graph API - Permanent Delete for Mailbox Items

February 2025

  1. Introducing Exchange Online Tenant Outbound Email Limits
  2. The way to control EWS usage in Exchange Online is changing
  3. Released: 2025 H1 Cumulative Update for Exchange Server

January 2025

  1. When is Exchange 2019 CU15 coming (and more news)
  2. Introducing the Microsoft Graph Export-Import APIs for Exchange in public preview
  3. Exchange Emergency Mitigation Service might not work for servers significantly out of date
  4. T-9 months: Exchange Server 2016 and Exchange Server 2019 End of Support
  5. Update and timeline of retirement of Search-MailboxAuditLog and New-MailboxAuditLogSearch cmdlets

December 2024

  1. Announcing Public Preview of the New Message Trace in Exchange Online
  2. Update on Client Access Rules Deprecation in Exchange Online
  3. Updates on Servicing Exchange Server 2019
  4. Update on nested app authentication and deprecation of Exchange Online legacy tokens

November 2024

  1. Re-release of November 2024 Exchange Server Security Update packages
  2. Update on Exchange Server ADFS Modern Authentication support
  3. Security Related Updates in Exchange Online
  4. Critical Update: ApplicationImpersonation RBAC Role Deprecation in Exchange Online
  5. Released: November 2024 Exchange Server Security Updates
  6. Introducing Exchange Online Delicensing Resiliency to protect against unintended delicensing actions

October 2024

  1. IPv6 updates for Exchange Online
  2. Announcing Optional Help File Loading in Exchange Online PowerShell
  3. Announcing General Availability of Inbound SMTP DANE with DNSSEC for Exchange Online
  4. End of Support for Exchange Server 2016 and Exchange Server 2019: T-12 Months
  5. New URL for Exchange admin center (EAC) in Exchange Online
  6. Updates to High Volume Email (HVE) Public Preview

September 2024

  1. Upgrading your organization from current versions to Exchange Server SE

August 2024

  1. Exchange Online Message Recall Updates
  2. Decommissioning Exchange Server 2016
  3. Enhancements to the Outbound Messages in Transit Security Report

July 2024

  1. Demystifying Exchange Online Provisioning: Architecture, Exchange Object Types, and Attributes
  2. Announcing Public Preview of Inbound SMTP DANE with DNSSEC for Exchange Online

June 2024

  1. Troubleshooting Cross-Tenant Mailbox Migrations
  2. Update on the Deprecation of Admin Audit Log Cmdlets
  3. Introduction to Cross-Tenant Mailbox Migrations
  4. Enhanced Filtering for Connectors - Improving Deliverability and Minimizing False Positives

May 2024

  1. Exchange Server Roadmap Update

April 2024

  1. Released: April 2024 Exchange Server Hotfix Updates
  2. Exchange Online to retire Basic auth for Client Submission (SMTP AUTH)
  3. Exchange Online to introduce External Recipient Rate Limit
  4. Review an upcoming authentication change for Outlook add-ins
  5. Public Preview: High Volume Email for Microsoft 365

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