Fake Calendly / scheduling tool meeting invitation phishing — impersonates Calendly, Cal.com, Doodle, or scheduling platforms with a "confirm your meeting" link that harvests Microsoft 365 or Google credentials; Cofense 2024: scheduling-tool phishing emerged as top-10 business email threat as remote work normalized calendar link flows

Phishing emails impersonating Calendly, Cal.com, Doodle, or other scheduling platforms with a fake "meeting has been scheduled" or "confirm your meeting" notification that leads to a Microsoft 365 or Google credential-harvest page — exploiting the normalized expectation that clicking scheduling links is safe and routine. Key facts: (1) Cofense 2024: scheduling-tool phishing emerged as a top-10 business email threat category, driven by the mass normalization of remote work calendar flows — employees click "confirm meeting" links automatically, the same way they follow "download file" links; (2) The attack perfectly mimics real Calendly, Doodle, and Cal.com notification emails in structure: "Someone scheduled a 30-minute call with you — click to confirm" followed by a credential page that harvests Microsoft 365 or Google Workspace logins for business email account takeover; (3) The attacker's goal is not just credential theft — business calendar access enables deep spear-phishing and BEC (Business Email Compromise): once the attacker can read the victim's calendar, they know who to impersonate, what meetings are scheduled, which executives to target, and what context will make the next fraudulent email convincing; (4) Legitimate Calendly, Cal.com, and Doodle meeting notifications arrive from verified platform domains and link directly to the hosted event page — they never require the recipient to re-authenticate with Microsoft or Google credentials to view a meeting they were invited to. Warning signs: sender domain not calendly.com, cal.com, or doodle.com; confirmation requires Microsoft 365 / Office 365 / Google account sign-in; no specific inviter name, meeting title, or date/time shown; urgency language about confirming immediately.