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.  

The Admin's Guide to Microsoft Exchange Server Subscription Edition - Kindle edition by Schnoll, Scott. Download it once and read it on your Kindle device, PC, phones or tablets. Use features like bookmarks, note taking and highlighting while reading The Admin's Guide to Microsoft Exchange Server Subscription Edition.

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).  

The largest IT conference in Slovenia, bringing together professionals, experts, and enthusiasts in technology, business, and education.

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

I’ve written extensively about Exchange Server licensing in my latest book on Exchange Server SE, and in several LinkedIn articles, such as: Exchange Server SE Licensing and Product Keys, Part I Excha...

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.  

As you hopefully know, the RTM version of Exchange Server SE continues support for using the product keys from Exchange Server 2019 and that new product keys are expected in CU1. The new product keys ...

This is the hot question about Exchange Server SE today: Where is CU1? It's a reasonable question with a reasonable answer. It was back in May 2024 when I provided the first Roadmap update for Exchang...

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

In April 2025, Microsoft announced a 2-stage process for upcoming changes to Exchange hybrid rich coexistence deployments (deployments with Exchange Server users that need Free/Busy, MailTips, profile...

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!  

PSA: Disabling OWA Calendar probe in Exchange Server SE Mitigation M2.1.x, released yesterday by Microsoft has some known issues, some of which are documented in their blog post announcement (https:/...

Today, Microsoft released mitigation M2.1.

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.  

The mailbox import and export APIs on Microsoft Graph are now generally available.

We have released a Hotfix Update for Exchange Server SE.  

We have released a Hotfix Update for Exchange Server SE.  

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.  

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

It’s difficult to determine the exact birth date of Exchange Server. The first iteration of it wasn’t even called Exchange Server.

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

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.  

Since posting my previous articles about licensing and product keys in Exchange Server SE, Exchange Server SE Licensing and Product Keys and Exchange Server SE Licensing, Part II, I’ve received even m...

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.