SECURITYQUIET
1 hour ago · Global
Microsoft fixes classic Outlook bug that hid Copilot buttons
SIGNALSMONITORSECURITY
What's happening
SignalsMonitor is following this as a security story. BleepingComputer is the outlet attached so far. The reports are tied to Global. The first report grouped here was at 19 Oct 2026, 12:44 UTC. The headline in use is “Microsoft fixes classic Outlook bug that hid Copilot buttons”. This note is SignalsMonitor's own briefing, not the publisher's article.
What we know
Microsoft has fixed a known issue that removed the Copilot Chat and Copilot buttons in the classic Outlook desktop mail client for some Windows users. [...
BleepingComputerRead at BleepingComputer
Story timeline
Reports grouped into this story, earliest first. Exact repeats from the same outlet are collapsed.
- First reported by BleepingComputer
Microsoft fixes classic Outlook bug that hid Copilot buttons
Reported by 1 outlet
- BleepingComputer
- BleepingComputerMicrosoft fixes classic Outlook bug that hid Copilot buttons