Exchange Hybrid
The latest Exchange Hybrid coverage — news, analysis, and updates from the WindowsNews.AI desk.
Microsoft's Cloud Managed Mailbox Writeback Preview Marks the End of the Last Exchange Server Era
Microsoft has pushed Exchange Cloud Managed Mailbox Writeback into public preview as of May 2026, giving hybrid organizations a clear path to permanently shut down their last on-premises Exchange...
Exchange Hybrid Must Migrate to Graph by April 2027 or Risk Broken Features
Microsoft has drawn a hard line in the sand for Exchange hybrid organizations. By April 2027 at the latest, all Exchange Server Subscription Edition hybrid customers must move their rich coexistence...
48-Hour Exchange Hybrid Free/Busy Blackout Hits Unprepared Tenants September 16
At 07:00 UTC on September 16, 2025, Microsoft will flip a switch that breaks free/busy lookups, MailTips, and profile picture sharing between on-premises Exchange and Exchange Online for any hybrid...
Microsoft Ships September 2025 Exchange Hotfixes to Keep Hybrid Apps Running as October 31 Deadline Looms
Microsoft released a targeted set of Hotfix Updates (HUs) for Exchange Server this September, delivering a non‑security fix while ensuring the newly engineered dedicated Exchange hybrid application...
Microsoft’s IsExchangeCloudManaged Feature Finally Retires the Last Exchange Server in Hybrid
Hybrid organizations that kept an on-premises Exchange server solely for recipient management can finally decommission that long-standing dependency. Microsoft has released a new capability that...
Microsoft and CISA Demand Hybrid Exchange Overhaul: October 31 Permanent Cutoff After Vulnerability Alert
Microsoft has drawn a hard line in the sand for hybrid Exchange administrators: after October 31, 2025, any on-premises server still relying on the legacy shared service principal for rich...
Per-Mailbox Cloud Management Lets Admins Finally Retire the Last Exchange Server
Microsoft has released a per‑mailbox cloud management feature that finally gives hybrid Exchange organizations a clear path to unplugging the last on‑premises Exchange server. With the new...
Patch Domain Controllers Now: Microsoft's August Updates Fix Kerberos Zero-Day, Hybrid Exchange Flaws, and 107 Bugs
Microsoft's August 2025 Patch Tuesday landed with an unusual bang, delivering fixes for 107 vulnerabilities, including a publicly disclosed Kerberos zero-day that can hand attackers the keys to an...
Microsoft's 111-CVE August Patch Tuesday Forces CISA Emergency Directive as Kerberos Zero-Day Looms
Microsoft released one of its heaviest Patch Tuesday updates in months this August, shipping fixes for 111 security vulnerabilities and setting off a chain reaction that includes a public zero-day...
CISA Emergency Directive Targets Exchange Hybrid Flaw in August Patch Tuesday Deluge
The Cybersecurity and Infrastructure Security Agency (CISA) issued an emergency directive late Tuesday, ordering federal agencies to secure on-premises Exchange servers within hours after a newly...
Microsoft Patches Publicly Disclosed ‘BadSuccessor’ Kerberos Zero-Day and Exchange Hybrid Cloud Threat in August 2025 Update
Microsoft’s August 2025 security update patches a publicly disclosed Kerberos privilege escalation flaw and a dangerous Exchange hybrid vulnerability that could let attackers hop from on-premises...
CVE-2025-25007: Critical Exchange Server Spoofing Vulnerability Demands Immediate Action Despite Scant Details
A newly disclosed spoofing vulnerability in Microsoft Exchange Server is ratcheting up urgency for enterprise security teams, even as technical specifics remain locked behind Microsoft’s...