20 Sep, 2026

Microsoft Outlook to block more risky attachments used in attacks

Microsoft announced it will expand the list of blocked attachments in Outlook Web and the new Outlook for Windows starting next month. The company said on Monday in a Microsoft 365 Message Center update that Outlook will block .library-ms and .search-ms file types beginning in July. “As part of our ongoing efforts to enhance security […]

3 mins read

Microsoft fixes Outlook paste, blank calendar rendering issues

​Microsoft has confirmed several issues affecting Microsoft 365 customers using the “paste special’ option and the calendar feature in the classic Outlook email client. As the company explains, users in the Current Channel trying to use the Ctrl+Alt+V paste special keyboard shortcut will see that it doesn’t work after updating to Version 2503 Build 18623.20156 because of changes introduced […]

2 mins read

Microsoft fixes Outlook on the web search issues, failures

Microsoft is working on fully mitigating issues causing Outlook on the web and SharePoint Online users to experience delays or failures when searching. Tracked under EX1063763 in the Microsoft 365 Admin Center, the issues are caused by infrastructure components responsible for processing users’ search requests that perform below acceptable performance thresholds. The company first acknowledged this Exchange […]

2 mins read

Microsoft announces fix for CPU spikes when typing in Outlook

Microsoft says it will soon fix a known issue causing CPU spikes when typing messages in recent versions of its classic Outlook email client. Redmond confirmed this bug last week after a wave of user reports on various online platforms since early November, including Microsoft’s community website, with those affected saying that disabling all spell-check options and add-ins […]

2 mins read

Microsoft warns of CPU spikes when typing in classic Outlook

Microsoft warned Windows users of increased CPU usage when typing while using recent versions of the classic Outlook email client. The company acknowledged this issue following a wave of user reports on social media and various online platforms since early November, including Microsoft’s community website. Those affected reported that disabling all spell-check options and add-ins did […]

2 mins read

Microsoft fixes button that restores classic Outlook client

​Two weeks ago, Microsoft said it was investigating an issue causing the new Outlook email client to crash when users clicked a button that should’ve helped them switch back to classic Outlook. The company now says this bug has been fixed, and clicking the “Go to classic Outlook” button will no longer crash New Outlook […]

1 min read

Microsoft says button to restore classic Outlook is broken

Microsoft is investigating a known issue that causes the new Outlook email client to crash when users click the “Go to classic Outlook” button, which should help them switch back to the classic Outlook. “Some users have reported that the ‘go back to classic Outlook’ button in new Outlook for Windows does not open a […]

2 mins read

Microsoft links recent Microsoft 365 outage to buggy update

​Microsoft says a coding issue is behind a now-resolved Microsoft 365 outage over the weekend that affected Outlook and Exchange Online authentication. According to an incident report published in the Microsoft 365 admin center on Saturday at 09:29 PM UTC, the incident also triggered Teams and Power Platform degraded functionality and caused Purview access issues and errors. […]

2 mins read

Microsoft fixes Outlook drag-and-drop broken by Windows updates

​Microsoft has fixed a known issue that broke email and calendar drag-and-drop in classic Outlook after installing recent updates on Windows 24H2 systems. According to Redmond, the updates that trigger these problems are the KB5050094 January 2025 preview cumulative update and the KB5051987 February 2025 security update. “After installing the January 2025 Windows non-security preview update and subsequent updates […]

2 mins read

New FinalDraft malware abuses Outlook mail service for stealthy comms

A new malware called FinalDraft has been using Outlook email drafts for command-and-control communication in attacks against a ministry in a South American country. The attacks were discovered by Elastic Security Labs and rely on a complete toolset that includes a custom malware loader named PathLoader, the FinalDraft backdoor, and multiple post-exploitation utilities. The abuse of Outlook, […]

3 mins read