The threat actor behind the SolarWinds attack – which was thought to have compromised around 18,000 customers using the company’s Orion software last year – is now targeting Microsoft mailbox owners ...

Mandiant security researchers have observed UNC2452, the group they're tracking in association with the SolarWinds attacks, using a new tactic targeting Microsoft 365 mailboxes. Mandiant began ...

It's hard to think of Microsoft Office as anything other than the archetypal Windows desktop program. But while no one was looking, Microsoft's free online apps and storage turned surprisingly ...

With NHSmail, the secure email service used by the NHS, now based in Azure, the platform can now leverage online archiving, which will allow staff to store and manage older or legacy emails outside of ...

Microsoft is investigating an ongoing outage blocking Exchange Online customers worldwide from accessing their mailboxes or sending/receiving emails. Affected users see "550 5.4.1 Recipient address ...

Microsoft 365’s “secure by default” stance removes some tools used by security teams. Here’s how to work around the new restrictions. We live in a dangerous world. You only have to look at the ...

Microsoft 365 business and enterprise prices rose on July 1, 2026, with new AI, security, and Intune features added to plans.

Microsoft today launched Clutter, an email filtering option for Office 365 business customers. The tool, which Microsoft debuted earlier this year in Outlook Web App (OWA), the browser-based mail ...

Microsoft Tuesday previewed a new webmail service called Outlook.com that will soon replace Hotmail. The company hopes that new features built into the web-based Outlook client will draw web users ...