A Reddit user known as Meta4X has decommissioned a self-hosted Microsoft Exchange installation that began with Exchange 5.5 on Windows NT 4 in 1999, replacing its final role as a network alert relay with Postfix on Ubuntu Server LTS. The user had already migrated mailboxes and email delivery to Microsoft 365 a couple of years earlier, keeping Exchange around only for internal alerting. Over the decades the setup was upgraded through Exchange 2000, 2003, 2007, 2010, 2013, 2016 and 2019.
tomshardware.com
· 2026-11-07
Shadowserver has identified nearly 22,000 internet-exposed Microsoft Exchange servers that remain unpatched against CVE-2026-62911, a high-severity authentication bypass flaw affecting Exchange Server 2016, 2019, and Subscription Edition. Most vulnerable systems are located in the United States and Germany, where officials say roughly 85% of on-premises Exchange servers remain exposed despite Microsoft releasing a fix in August 2026.
bleepingcomputer.com
· 2026-09-01
Microsoft confirmed it is investigating a major Exchange Online disruption, tracked internally as EX1464935, after a flood of user reports began around 5:30 PM UTC. Tens of thousands of users reported problems sending and receiving emails, logging into accounts, and managing mailboxes through Outlook and admin tools, according to Downdetector data.
bleepingcomputer.com
· 2026-08-31
GoKawiil