Exchange
Everything ChangeIntel collected about Exchange from 19 sources, on one timeline.
Message Center action date in 2 days, Sun 15 NovMC1511071: Action required: Review property changes for Exchange Online scenarios
- 49 changes in the last 30 days
- 2 open known issues
- 2 dates in the next 90 days
- 3 roadmap items in progress
Exchange timeline
8 weeks back, 8 ahead · marks show importance · counts use first-seen records- Release or post
- Known issue
- Out-of-band, exploited, or incident
- Revised by its source
- Deadline
Releases & versionsKBs · versions · tool releases
Nothing new
SecurityMSRC · CISA KEV · security news
- Fri 2 Oct · Published vulnerability: Microsoft Exchange Server Elevation of Privilege Vulnerability (Microsoft states that customer action is required)
- Tue 13 Oct · Published vulnerability: Microsoft Exchange Server Spoofing Vulnerability and 5 more (Microsoft states that customer action is required)
- Thu 22 Oct · Published vulnerability: Microsoft Exchange Online Remote Code Execution Vulnerability (Fixed by Microsoft in the service; nothing to deploy; Microsoft rates the vulnerability Critical)
- Tue 10 Nov · Published vulnerability: Microsoft Exchange Server Remote Code Execution Vulnerability and 8 more (Microsoft states that customer action is required)
Nothing new
Issues & breaking changesKnown issues · breaking changes · incidents
- Fri 2 Oct · Product known issue: Availability (free/busy) fails for delegated mailboxes in Exchange hybrid deployments that use Graph API only and 4 more (Known issue published by Microsoft)
- Fri 16 Oct · Revised by Exchange Server update known issues: A published calendar (.ics) returns "HTTP 500" for calendar applications and 2 more (Changed after ChangeIntel first saw it)
- Tue 10 Nov · Known issue resolved: Users might be unable to sign in to OWA or send emails on Exchange Server
Nothing new
RoadmapMicrosoft 365 roadmap
Nothing new
News & announcementsBlogs · what's new pages
- Thu 24 Sep · Product news: Released: September 2026 Exchange Server Security Updates
- Wed 30 Sep · Product news: Impact of Exchange Online EWS Deprecation on Hybrid Rich Coexistence and Cross-org Sharing
- Thu 1 Oct · Product news: Action Required: Upgrade ExchangeOnlineManagement PowerShell Module to Version 3.10.1 or Newer
- Fri 2 Oct · Product news: Released: September 2026 V2 Exchange Server Security Updates
- Thu 8 Oct · Product news: Sending From Email Aliases – General Availability
- Mon 12 Oct · Guidance changed: Exchange Online authentication and 2 more (The page title or its body outside the tracked passages changed. Review the source for its effect.)
- Tue 13 Oct · Guidance changed: Outlook for iOS and Android in Exchange Online and 12 more (The page title or its body outside the tracked passages changed. Review the source for its effect.)
- Wed 14 Oct · Product news: Notes from the field: testing EWSAllowedAppIDs safely
- Sat 17 Oct · Product news: Released: October 2026 Exchange Server Security Updates
- Sun 18 Oct · Guidance changed: New Exchange admin center and 1 more (The page title or its body outside the tracked passages changed. Review the source for its effect.)
- Mon 19 Oct · Product news: The Change Optics Report is now Generally Available in Exchange Online
- Mon 19 Oct · Guidance changed: Exchange Online limits (1 new passage (about 30 words), 1 edited passage (5 words changed). The changed wording mentions supported platforms. Review the source to confirm the effect.)
- Tue 20 Oct · Product news: Cross-tenant Free/Busy, MailTips, and Calendar Sharing are moving to Cross-Tenant Access Policy
- Wed 21 Oct · Product news: Exchange Online EWS application stopped working? Do this.
- Fri 23 Oct · Guidance changed: Exchange Online EWS retirement (2 new passages (about 20 words), 1 edited passage (16 words changed). No rule matched the changed words; review the source for its effect.)
- Mon 26 Oct · Product news: EWS Deprecation Is Here – What This Means To You
- Fri 30 Oct · Endpoint change observed: Worldwide · Common endpoint set 125 and 2 more (Changed set: URLs. Observed version 2026081400 → 2026103000; effective date unknown.; A public connectivity change is a reason to assess your network; no firewall change is inferred or performed.)
- Mon 9 Nov · Product news: Now available: OAuth authentication for on-premises Exchange mailbox migrations to Microsoft 365
- Tue 10 Nov · Product news: Exchange servers may become unstable after installation of October 2026 Windows updates and 1 more
- Thu 12 Nov · Guidance changed: Exchange Online limits (1 edited passage (6 words changed). No rule matched the changed words; review the source for its effect.)
27 changes1 worth a look
Dates & retirementsLifecycle · retirement notices
- Thu 1 Oct · Recorded guidance date: Exchange Web Services retirement announcement (The source states an exact date. Check its scope and required action in the cited guidance.)
- Mon 26 Oct · Announced retirement: Outlook: Copilot Prioritize feature will be retired
- Thu 31 Dec · Announced retirement: Exchange Online: Retirement of legacy TLS versions for POP and IMAP connections (Retirement in 48 days)
Nothing newNext: Thu 31 Dec
Message CenterMicrosoft 365 admin notices
- Mon 14 Sep · Message Center · Plan for change: MC1230457: Moderation approvals now available across Outlook apps
- Mon 14 Sep · Notice updated: MC1093912: (Updated) Microsoft Outlook for iOS/Android: Improved Contacts with profile enrichment and duplicate management
- Tue 15 Sep · Message Center · Plan for change: MC1472598: Microsoft 365: Find more actions in the suite header menu
- Fri 18 Sep · Notice updated: MC1469960: (Updated) Microsoft Exchange Online: Review and configure EWSAllowedAppIDs before Exchange Web Services access changes (Microsoft categorizes this notice as "Prevent or fix issues")
- Fri 25 Sep · Message Center · Plan for change: MC1479513: Outlook: Insert Symbols
- Tue 29 Sep · Notice updated: MC1458470: (Updated) Simplified Copilot experience in Microsoft Outlook and 1 more
- Wed 30 Sep · Message Center · Plan for change: MC1483974: Action Required: Upgrade ExchangeOnlineManagement PowerShell Module to Version 3.10.1 or Later (Microsoft marks it a major change)
- Wed 30 Sep · Message Center action date: MC1172532: (Updated) Action Required: Update active Exchange Web Services Applications and 3 more
- Thu 1 Oct · Message Center · Stay informed: MC1485116: Microsoft Exchange Online: Exchange Web Services (EWS) enforcement update for EWSAllowedAppIDs
- Thu 1 Oct · Message Center action date: MC1446796: (Updated) Migrate Free/Busy, MailTips, and Calendar Sharing before EWS deprecation
- Mon 5 Oct · Notice updated: MC1338816: (Updated) New Outlook for Windows becomes available for GCC High and DoD and 1 more (Microsoft marks it a major change)
- Tue 6 Oct · Notice updated: MC1465779: (Updated) Outlook for Mac: Sensitivity label recommendations and auto-labeling from attachments and 6 more
- Wed 7 Oct · Message Center · Plan for change: MC1490899: Microsoft 365: Targeted Release retirement (Microsoft marks it a major change)
- Wed 7 Oct · Notice updated: MC1465780: (Updated) Outlook for iOS and Android: Automatically apply email sensitivity labels from labeled attachments
- Fri 9 Oct · Message Center · Plan for change: MC1492954: Microsoft Outlook: Themes by Copilot retirement and 1 more (Microsoft marks it a major change)
- Thu 15 Oct · Message Center · Stay informed: MC1509800: Microsoft Outlook for Android: Multi-select and bulk actions in search results
- Fri 16 Oct · Message Center · Plan for change: MC1511071: Action required: Review property changes for Exchange Online scenarios and 1 more (Microsoft marks it a major change)
- Fri 16 Oct · Notice updated: MC1191578: (Updated) Update to EWS Access for Kiosk / Frontline Worker Licenses (Microsoft marks it a major change)
- Mon 19 Oct · Message Center · Stay informed: MC1515932: External Recipients Banner on Outlook Mobile and 1 more
- Wed 21 Oct · Notice updated: MC1458484: Filter Messages by Events on Outlook Mobile
- Thu 22 Oct · Notice updated: MC1519861: (Updated) Outlook: Copilot Prioritize feature will be retired
- Mon 26 Oct · Message Center · Stay informed: MC1526668: Change Optics Report
- Mon 26 Oct · Notice updated: MC1441784: (Updated) Microsoft Copilot for Outlook: New Copilot entry point in Classic Outlook and 2 more
- Tue 27 Oct · Message Center · Plan for change: MC1528007: Join button will require HTTPS meeting links
- Tue 27 Oct · Notice updated: MC1510951: (Updated) Windows updates are available for 2026 time zone changes in Canada (Microsoft categorizes this notice as "Prevent or fix issues"; Microsoft marks it a major change)
- Sat 31 Oct · Message Center action date: MC1490899: Microsoft 365: Targeted Release retirement
- Wed 4 Nov · Notice updated: MC1245222: (Updated) Outlook: Share Word, Excel and PowerPoint local files via the new Outlook for Windows
- Thu 5 Nov · Message Center · Plan for change: MC1540345: Action required: Update permissions for Exchange Online Admin API and 2 more (Microsoft marks it a major change)
- Fri 6 Nov · Notice updated: MC1193692: (Updated) Microsoft 365: Enrich profile cards with custom properties from third-party systems and 2 more
- Mon 9 Nov · Notice updated: MC1446796: (Updated) Migrate Free/Busy, MailTips, and Calendar Sharing before EWS deprecation and 1 more (Microsoft marks it a major change)
- Tue 10 Nov · Notice updated: MC1488841: (Updated) Microsoft Outlook: Update to default blocked file types in OwaMailboxPolicy (Microsoft marks it a major change)
- Fri 13 Nov · Message Center · Stay informed: MC1551148: [Outlook for iOS and Android] Copilot Chat in Outlook UX improvements
- Sun 15 Nov · Message Center action date: MC1511071: Action required: Review property changes for Exchange Online scenarios (Action due in 2 days)
63 changesNext: Sun 15 Nov
Latest changes
Newest first- Message Center · Stay informed · MC1551148: [Outlook for iOS and Android] Copilot Chat in Outlook UX improvements Microsoft 365 Message Center Archive by Merill Fernando
- Published vulnerability · Microsoft Exchange Server Remote Code Execution Vulnerabilityand 3 more that day · changelog
- New version · Exchange Server SE · Build: 15.2.2562.57 (RTM Nov26SU)
- Product news · Exchange servers may become unstable after installation of October 2026 Windows updatesand 1 more that day · changelog
- Known issue resolved · Users might be unable to sign in to OWA or send emails on Exchange Server
- Product news · Now available: OAuth authentication for on-premises Exchange mailbox migrations to Microsoft 365
- Message Center · Plan for change · MC1540345: Action required: Update permissions for Exchange Online Admin API Microsoft 365 Message Center Archive by Merill Fernandoand 1 more that day · changelog
- Message Center · Stay informed · MC1539000: Microsoft Outlook: Search within a selected folder Microsoft 365 Message Center Archive by Merill Fernando
Every change about Exchange is in the change stream.
Also mentioned in
18Not counted as Exchange changes
- Microsoft Revamps Exchange Online Admin API Permissions Office 365 for IT Pros (Tony Redmond) · Fri 13 Nov
- Microsoft Adds OAuth Support to Exchange Online Mailbox Migrations Petri IT Knowledgebase · Thu 12 Nov
- Exchange Online Retention: How MRM Policies and Tags Work Petri IT Knowledgebase · Wed 11 Nov
- Exchange Online Admin API Apps Must Migrate to New Permissions Petri IT Knowledgebase · Mon 9 Nov
- Microsoft Issues Mitigation for Exchange Server Issues Caused by October Windows Updates Petri IT Knowledgebase · Mon 19 Oct
- Windows/Exchange Server October 2026 issue: Analysis and Workarounds Born's Tech and Windows World · Sat 17 Oct
- How to Disable SMTP AUTH in Exchange Online Ali Tajran · Mon 5 Oct
- Microsoft Purview: Data Lifecycle Management-Auto-Archive for Exchange Online Microsoft 365 Message Center Archive by Merill Fernando Microsoft 365 Roadmap · Wed 30 Sep
- How to Enable Cross-Tenant Message Recall in Exchange Online Ali Tajran · Mon 14 Sep
- PSA: Exchange Online stops honoring Sharing policies Vasil Michev · Fri 11 Sep
- Microsoft Purview: Data Loss Prevention – Default Protection Controls for Exchange Online in the event of classification failure Microsoft 365 Message Center Archive by Merill Fernando Microsoft 365 Roadmap · Tue 1 Sep
- Microsoft Purview: Data Loss Prevention - Granular classification error controls (Exchange online) Microsoft 365 Message Center Archive by Merill Fernando Microsoft 365 Roadmap · Thu 13 Aug
6 older records name Exchange too; search finds them.
Threads
Related changes across sources- MC1540345: Action required: Update permissions for Exchange Online Admin API Message Center · Plan for change1 about Exchange, in a thread of 2 changes Follow evidence and connection reasons
- October 2026 Patch Tuesday Known issue resolved: Users might be unable to sign in to OWA or send emails on Exchange Server9 about Exchange, in a thread of 1494 changes Follow evidence and connection reasons
- November 2026 Patch Tuesday Published vulnerability: Microsoft Exchange Server Remote Code Execution Vulnerability9 about Exchange, in a thread of 1105 changes Follow evidence and connection reasons
- September 2026 Patch Tuesday Published vulnerability: Microsoft Exchange Server Remote Code Execution Vulnerability9 about Exchange, in a thread of 1016 changes Follow evidence and connection reasons
Revised by Microsoft
5756 with a status or version change
49 more revised items are on the timeline.
ChangeIntel compares its own snapshots, so the date is when it noticed the change; Microsoft may have made it earlier.
Guidance
19 monitored pagesAbout this page
19 sources
Watching for changes since 26 Sep 2026. Revisions Microsoft made before then were not observed, which does not mean there were none.
A change belongs to Exchange when it comes from a source about the product or one of its names (Exchange, Exchange Online, Exchange Server, Microsoft Exchange), when a roadmap entry, Windows release, or known issue lists it, or when an MSRC CVE, CISA entry, or lifecycle date names it. Another product's notes and community posts that only mention Exchange are listed under "Also mentioned in" and are not counted as its changes. Sources marked quiet are about Exchange alone and have had nothing new for 30 days; check the source before reading silence as "no change".
- Exchange Server build numberslatest 10 Nov
- Exchange Team Bloglatest 10 Nov
- Exchange Server update known issuesquiet since 2 Oct
- Exchange documentation contentsnothing collected yet
- Microsoft 365 Message Center Archive by Merill Fernandolatest 13 Nov
- MSRC CVE details (CVRF API)latest 10 Nov
- CISA Known Exploited Vulnerabilitieslatest 13 Apr
- Microsoft 365 Roadmaplatest 30 Sep
- Petri IT Knowledgebaselatest 12 Nov
- Vasil Michevlatest 11 Sep
- Ali Tajranlatest 5 Oct
- Office 365 for IT Pros (Tony Redmond)latest 13 Nov
- Born's Tech and Windows Worldlatest 17 Oct
- Classic Outlook known issueslatest Oct 2025
- Microsoft Defender for Office 365 what's newlatest Oct 2023
- Microsoft Graph known issues1 undated record
- Microsoft Purview Bloglatest 20 Apr
- Microsoft Purview what's newlatest Jul 2026
- Windows release health known issueslatest 10 Nov