Microsoft Outlook Bug Removes Copilot Button For Windows Users
ID: 5f431737-c4f9-5047-a9bc-449a22f3459a
STIX ID: report--5f431737-c4f9-5047-a9bc-449a22f3459a
Feed Name: cybersecurityNews.com
A licensing-validation bug in classic Outlook for Windows (build 20026.20182+) caused Copilot Chat and Copilot UI entry points to vanish for users with Basic-tier Copilot licenses. Microsoft resolved the issue via a server-side fix on June 29, 2026; recommended interim workarounds included using Outlook on the web or reverting to the prior build, and administrators were advised to check update channels and tenant privacy settings.
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