18 Apr, 2026

Microsoft Teams to let admins block external users via Defender portal

Microsoft announced that security administrators will soon be able to block external users from sending messages, calls, or meeting invitations to members of their organization via Teams. The new feature will start rolling out in early January, integrating Microsoft Teams with Defender for Office 365, and enabling admins to manage blocked external contacts through the […]

2 mins read

Microsoft Defender portal outage disrupts threat hunting alerts

Microsoft is working to mitigate an ongoing incident that has been blocking access to some Defender XDR portal capabilities, including threat hunting alerts. According to an admin center service alert (DZ1191468) seen by GeekFeed, this outage may affect customers attempting to access or use features in the Defender portal. The issues are caused by what […]

2 mins read

Microsoft Defender mistakenly flags SQL Server as end-of-life

Microsoft is working to resolve a known issue that causes its Defender for Endpoint enterprise endpoint security platform to incorrectly tag SQL Server software as end-of-life. According to a service alert seen by GeekFeed, this bug has been impacting Microsoft Defender XDR customers with SQL Server 2017 and 2019 since at least Wednesday morning. While Defender flagged […]

2 mins read

Microsoft Defender bug triggers erroneous BIOS update alerts

Microsoft is working to resolve a bug that causes Defender for Endpoint to incorrectly tag some devices’ BIOS (Basic Input/Output System) firmware as outdated, prompting users to update it. In a service alert seen by GeekFeed, Redmond said that this known issue affects Dell devices and is caused by a Defender for Endpoint logic bug. “Microsoft have identified […]

1 min read

Microsoft Defender for Office 365 now blocks email bombing attacks

Microsoft says its Defender for Office 365 cloud-based email security suite will now automatically detect and block email bombing attacks. Defender for Office 365 (formerly known as Office 365 Advanced Threat Protection or Office 365 ATP) protects organizations operating in high-risk industries and dealing with sophisticated threat actors from malicious threats from email messages, links, […]

2 mins read