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OpenAI's ChatGPT Work and Microsoft Exchange Online hit by separate outages

OpenAI reported elevated errors and latency on ChatGPT Work, its enterprise AI agent, for about three hours on Monday, while Microsoft separately confirmed degraded functionality across Exchange Online. Downdetector logged over 1,100 reports for OpenAI products and nearly 4,600 for Microsoft Outlook around 2:24 p.m. ET, though the companies gave no indication the two incidents were related.

Microsoft Exchange Online outage disrupts Outlook email for hours

Microsoft confirmed a widespread outage of Exchange Online on Monday, causing Outlook users to experience delayed or failed emails, authentication errors, and search failures. The company traced the problem to an authentication component and began testing a fix on part of its infrastructure before a broader rollout. Downdetector logged over 5,000 user reports by 2 PM ET, with complaints also flooding social media.

Microsoft's August 27 Windows 11 preview update breaks mouse cursor customization

Microsoft confirmed that its optional KB5120998 preview update, released August 27, is resetting or corrupting users' custom mouse cursor settings on Windows 11. Affected users report cursors becoming oversized, appearing as generic white icons, or vanishing entirely, with custom animations reverting to defaults. Microsoft acknowledged the bug on its known issues page but has not yet issued a fix.

Perplexity brings agentic AI 'Personal Computer' feature to Windows

Perplexity has extended its agentic AI feature, previously exclusive to Mac, to Windows 10 and 11 users on paid Pro, Max, or Enterprise plans. The tool can access local files, control native Windows applications, and connect to cloud services like OneDrive, Google Drive, Box, and Dropbox to complete multi-step tasks with minimal user input. A ZDNET reviewer tested it on five complex tasks to gauge its real-world usefulness.

Microsoft flags TerminalFix, a ClickFix variant using PowerShell for reverse network tunnels

Microsoft has identified a new ClickFix-style attack called TerminalFix that uses fake Cloudflare CAPTCHA pages on compromised websites to trick users into pasting and running malicious PowerShell commands in Windows Terminal. Rather than deploying simple infostealers, the campaign runs a multi-stage chain that hides payloads inside PNG images via steganography, establishes persistence through scheduled tasks and registry keys, and ultimately installs a custom Python-based reverse tunnel into the victim's internal network.

Microsoft Exchange Online hit by outage disrupting email and authentication

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.

Windows 11 adds permanent 'Opt out of backup' button to silence OneDrive prompts

Microsoft is rolling out a new button in Windows 11's full-screen backup prompt that lets users permanently dismiss repeated nudges to enable OneDrive backup through Windows Backup. Windows Latest spotted the option on two PCs running stable Windows 11 25H2 builds, even on machines without the OneDrive sync client installed. Microsoft says clicking it won't delete existing OneDrive files or change sync settings—it simply stops the recurring prompt.

Windows 11 KB5120998 update breaks custom mouse cursor settings, Microsoft confirms

Microsoft has acknowledged that its optional KB5120998 preview update, released August 27, 2026, is causing custom mouse cursor personalizations to revert to default settings on Windows 11. Affected users report high-DPI cursors being swapped for standard white ones and custom animations disappearing, with no way to restore prior settings. The company says it is investigating and is asking impacted users to submit reports through the Feedback Hub.

Microsoft tells users to disregard false Defender Antivirus 'turned off' alerts

Microsoft confirmed a bug causing the Windows Security app to falsely display 'Microsoft Defender Antivirus is turned off' notifications after recent Defender updates, even though protection remains active. The issue, which has quietly affected Windows Insiders since June, now impacts all supported Windows client and server versions, including Windows 11 26H1 and Windows Server 2025. Microsoft says a fix is in development and will roll out in a future Defender update.

Microsoft Employee Spent $28,000 on AI Tools in a Month, Internal Data Shows

A leaked internal Microsoft spreadsheet revealed that one employee in the Customer and Partner Solutions unit racked up $28,000 in AI usage costs over a 28-day period, dwarfing the company-wide median of about $300. The disclosure came after Microsoft added an 'AI $ Usage Per Month' tracking column to its compensation data, exposing wide disparities in spending among roughly 350 employees who reported figures.

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