Scott Schnoll
@schnoll.bsky.social
Microsoft MVP - Exchange Author, The Admin’s Guide to Microsoft Exchange Server Subscription Edition - https://www.amazon.com/dp/B0FR5GGL75/ LinkedIn - https://www.linkedin.com/in/scottschnoll/
The September 2026 SU for Exchange Server SE is now available for download. This SU also resolves some known issues from previous updates. techcommunity.microsoft.com/blog/exchang... #MSExchange #Security
Released: September 2026 Exchange Server Security Updates | Microsoft Community Hub
We have released Security Updates for Exchange Server SE. Exchange Server 2019 and 2016 ESU updates only.
techcommunity.microsoft.com
Outlook for iOS and Outlook for Android can now use AD FS Modern Authentication to access mailboxes in supported pure on-premises Exchange Server deployments. techcommunity.microsoft.com/blog/exchang... #MSExchange #ADFS #ModernAuth
Exchange Server AD FS Modern Authentication: Expanded Outlook client support | Microsoft Community Hub
Expanded Outlook client support for Exchange Server AD FS Modern Authentication is here!
techcommunity.microsoft.com
Microsoft strongly recommends that customers review EWS usage and configure EWSAllowedAppIDs themselves. If an admin has already configured EWSAllowedAppIDs, Microsoft will not overwrite or change the list. techcommunity.microsoft.com/blog/exchang... #MSExchange #EWSDeprecation
Take control of your EWSAllowedAppIDs list before EWS access changes | Microsoft Community Hub
We wanted to provide additional guidance on how admins should use the EWSAllowedAppIDs allow list during EWS deprecation.
techcommunity.microsoft.com
PSA: Starting the second week of September 2026, Microsoft will raise the minimum allowed version of Exchange 2016/2019 servers that connect to Exchange Online over an inbound connector type of OnPremises to the October 2025 SU. techcommunity.microsoft.com/blog/exchang... #MSExchange #Security
Exchange 2016/2019: Throttling and Blocking up to the Final Public Update Baseline | Microsoft Community Hub
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...
techcommunity.microsoft.com
The Exchange Online team is looking for information on how customers and partners use ObjectGuid, SamAccountName, and DistinguishedName in Exchange Online. The link to their survey is in their blog post. techcommunity.microsoft.com/blog/exchang... #MSExchange #ExchangeOnline
Tell us how you use ObjectGuid, SamAccountName, and DistinguishedName in Exchange Online | Microsoft Community Hub
We wanted to ask how you use ObjectGuid, SamAccountName, and DistinguishedName in Exchange Online.
techcommunity.microsoft.com
Now available in Paperback (English) and Kindle formats (English, Spanish, German, French, Italian, and Portuguese) at more than half off! amazon.com/dp/B0FR5GGL75/ #MSExchange #ExchangeServerSE #AdminGuide
The Admin's Guide to Microsoft Exchange Server Subscription Edition
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.
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Scott Schnoll@schnoll.bsky.social · 4mo agoAre you responsible for deploying and managing Microsoft Exchange Server Subscription Edition? If so, I wrote this for you - amazon.com/dp/B0FR5GGL75/ Available in Paperback (English) and Kindle (English, German, French, Italian, and Portuguese) formats #MSExchange #admins
Microsoft wants feedback from customers and partners in cross-tenant environments (e.g., Exchange Server/Org A and Exchange Online/Org B). See techcommunity.microsoft.com/blog/exchang... for more information and survey link. #MSExchange #CrossTenant #ExchangeOnline
Help us shape Exchange Server on-premises to different online org Free/Busy after EWS retirement | Microsoft Community Hub
We wanted feedback about Exchange Server on-premises to different online org Free/Busy sharing, after EWS retirement.
techcommunity.microsoft.com
This guide walks through tests to prove that EWSAllowedAppIDs is working, explains what the result means, and highlights an important naming trap that we are already seeing in customer conversations. techcommunity.microsoft.com/blog/exchang... #MSExchange #ExchangeOnline #EWS #EWSDeprecation
Notes from the field: testing EWSAllowedAppIDs safely | Microsoft Community Hub
We wanted to share some tips on how to test EWSAllowedAppIDs (EWS AppID allow list).
techcommunity.microsoft.com
Announced at www.microsoft.com/licensing/ne..., Microsoft 365 Business Suites now include 50 GB more primary email storage for eligible users for a max supported primary mailbox entitlement of 100 GB. See techcommunity.microsoft.com/blog/exchang... #ExchangeOnline #Microsoft365Business
First-time regional attendees can register now at www.ntk.si/en/registrat... and use NT1NVIT3SCOTT as your invite code. #Croatia #Serbia #BosniaandHerzegovina #Montenegro #Italy #Austria #Hungary #NT26
NT Konferenca
The largest IT conference in Slovenia, bringing together professionals, experts, and enthusiasts in technology, business, and education.
ntk.si
Scott Schnoll@schnoll.bsky.social · 2mo agoLive in Croatia, Serbia, Bosnia and Herzegovina, Montenegro, Italy, Austria, or Hungary, and haven't experienced NT? Now's your chance! This is exclusively for first-time regional attendees (you/your company must not have attended the past two years). Code: NT1NVIT3SCOTT #NT26
Live in Croatia, Serbia, Bosnia and Herzegovina, Montenegro, Italy, Austria, or Hungary, and haven't experienced NT? Now's your chance! This is exclusively for first-time regional attendees (you/your company must not have attended the past two years). Code: NT1NVIT3SCOTT #NT26
techcommunity.microsoft.com/blog/exchang... Microsoft is using AI to hunt for vulnerabilities in Exchange Server. This takes a long time to validate that the flagged items are real issues. CU1 will eventually arrive, and in the meantime, SUs and other updates are being released. #MSExchange #CU1
Where is Exchange SE CU1 anyway? | Microsoft Community Hub
We wanted to discuss why we are somewhat late with releasing Exchange SE CU1.
techcommunity.microsoft.com
Released: August 2026 Exchange Server Security Update (SU) techcommunity.microsoft.com/blog/exchang... As expected, this SU disables OWA Light. #MSExchange #Security
Released: August 2026 Exchange Server Security Updates | Microsoft Community Hub
We have released Security Updates for Exchange Server SE. Exchange Server 2019 and 2016 ESU updates only.
techcommunity.microsoft.com
If your organization shares Free/Busy, MailTips, or calendars with other Microsoft 365 organizations, then read techcommunity.microsoft.com/blog/exchang... See also, admin.cloud.microsoft?ref=MessageC.... #MSExchange #ExchangeOnline #CrossTenant
Cross-tenant Free/Busy, MailTips, and Calendar Sharing are moving to Cross-Tenant Access Policy | Microsoft Community Hub
We wanted to provide information related to migration of existing Exchange Online Organization Relationships to the new sharing model.
techcommunity.microsoft.com
Writeback for Cloud-Managed Remote Mailboxes is now Generally Available with support for up to 600,000 cloud-managed mailboxes and 24 writeback attributes. techcommunity.microsoft.com/blog/exchang... #MSExchange #ExchangeOnline
Writeback for Cloud-Managed Remote Mailboxes: Now Generally Available | Microsoft Community Hub
Writeback for cloud-managed remote mailboxes is now Generally Available!
techcommunity.microsoft.com
Released: July 2026 SU for Exchange Server SE After installing this SU, you can manually remove the mitigation for CVE-2026-42897. Also, use the latest Health Checker to check for deprecated SGs. techcommunity.microsoft.com/blog/exchang... #MSExchange #Security
Released: July 2026 Exchange Server Security Updates | Microsoft Community Hub
We have released Security Updates for Exchange Server SE. Exchange Server 2019 and 2016 ESU updates only.
techcommunity.microsoft.com
Tracking and reporting on Exchange Server license use in your organization www.linkedin.com/pulse/tracki... #MSExchange #Licensing #Reporting #Compliance
Tracking Exchange Server license use in your organization
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...
linkedin.com
Cross-Tenant Message Recall (controlled by a tenant allow list managed by the admin) is now available in Exchange Online. It is disabled by default and enabled when at least one tenant is added to an allow list. techcommunity.microsoft.com/blog/exchang... #MSExchange #MessageRecall #ExchangeOnline
Cross-Tenant Message Recall in Exchange Online | Microsoft Community Hub
We wanted to announce cross-tenant Message Recall in Exchange Online!
techcommunity.microsoft.com
Microsoft announced their plan to disable OWA Light in a future Exchange Server update (likely August 2026). This is for security and modernization, and customers should prepare to move to the full OWA experience. techcommunity.microsoft.com/blog/exchang... #MSExchange #OWALight #Announcement
Upcoming retirement of OWA Light in Exchange Server | Microsoft Community Hub
We wanted to tell you that we will be retiring OWA Light in Exchange Server.
techcommunity.microsoft.com
PSA: Preparing for new Exchange Server SE product keys www.linkedin.com/pulse/psa-pr... #MSExchange #ProductKeys #Licensing #PerpetualSoftware
PSA: Preparing for new Exchange Server SE product keys
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 ...
linkedin.com
In case you were wondering about Exchange Server SE CU1. www.linkedin.com/pulse/where-... #MSExchange #Updates
Where is Exchange Server SE CU1?
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...
linkedin.com
Are you responsible for deploying and managing Microsoft Exchange Server Subscription Edition? If so, I wrote this for you - amazon.com/dp/B0FR5GGL75/ Available in Paperback (English) and Kindle (English, German, French, Italian, and Portuguese) formats #MSExchange #admins
Amazon.com
amazon.com
The June 2026 SU for Exchange Server SE addresses vulnerabilities reported by security partners and found through Microsoft’s internal processes, as well as CVE-2026-42897. Review the blog post for details. techcommunity.microsoft.com/blog/exchang... #MSExchange #Security #EEMS #FeatureFlighting
Released: June 2026 Exchange Server Security Updates | Microsoft Community Hub
We have released Security Updates for Exchange Server SE. Exchange Server 2019 and 2016 ESU updates only.
techcommunity.microsoft.com
The first Flighted Feature in Exchange Server SE shipped and no one noticed www.linkedin.com/pulse/first-... #MSExchange #FeatureFlighting
The first Flighted Feature in Exchange Server SE shipped and no one noticed
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...
linkedin.com
Replacing IIS SMTP virtual server with Exchange Edge Transport | Microsoft Community Hub! 🦋 techcommunity.microsoft.com/blog/exchang...
Replacing IIS SMTP virtual server with Exchange Edge Transport | Microsoft Community Hub
How to go about replacing IIS SMTP virtual server with Exchange Edge Transport.
techcommunity.microsoft.com
Microsoft announced today that writeback for Cloud-Managed Remote Mailboxes is now in Public Preview! techcommunity.microsoft.com/blog/Exchang... For customers with no remaining dependency on their last Exchange Server, an updated guide for decommissioning it is now available! #MSExchange #Hybrid
Writeback for Cloud-Managed Remote Mailboxes: Now in Public Preview | Microsoft Community Hub
We are happy to announce public preview of writeback for cloud-managed remote mailboxes!
techcommunity.microsoft.com
Yesterday's Exchange Server mitigation breaks the OWA Calendar Proxy Test Probe, causing a lot of noise in the event log. You might consider temporarily disabling the probe, as discussed at linkedin.com/feed/update/... #MSExchange #security
Addressing Exchange Server May 2026 vulnerability CVE-2026-42897 | Microsoft Community Hub | Scott Schnoll
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:/...
linkedin.com
Microsoft released IIS URL Rewrite rule mitigation M2.1.0 for EEMS and EOMT today and disclosed CVE-2026-42897, a reported vulnerability affecting Outlook on the web in Exchange Server. This article talks about why you need EEMS or EOMT. lnkd.in/g7UNCHsQ #MSExchange
Why you need the Exchange Emergency Mitigation service
Today, Microsoft released mitigation M2.1.
lnkd.in
Microsoft disclosed CVE-2026-42897, a reported vulnerability affecting Exchange Server OWA. More info at techcommunity.microsoft.com/blog/exchang... #MSExchange #Security #EEMS #mitigation
Addressing Exchange Server May 2026 vulnerability CVE-2026-42897 | Microsoft Community Hub
We wanted to tell you how to address the Exchange Server May 2026 vulnerability CVE-2026-42897.
techcommunity.microsoft.com