Microsoft repairs Exchange login and mail problems after server updates

First reported by Neowin at · Updated · 2 sources

According to BleepingComputer, the problems affected Outlook sign-ins and mail delivery on Exchange Server systems after October 2026 Windows Server security updates were installed. Separately, Neowin reports that Microsoft is inviting select Windows Server customers to help shape its future through a preview initiative with requirements for joining.

Covered by 2 publishers within 35 hours of the first report.

Reporting2

Neowin Microsoft wants to work directly with customers to make Windows Server better with TAP · Usama Jawad
BleepingComputer Microsoft fixes Exchange sign-ins broken by Windows Server updates · Sergiu Gatlan

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Topics Microsoft