About this tag
Outlook themes coverage on WindowsForum.com tracks how Microsoft manages the look and feel of the Outlook client, including the retirement of AI-generated backgrounds. The main thread here documents Themes by Copilot, the feature that used AI to create custom Outlook backgrounds, and its scheduled worldwide removal in October 2026 under Microsoft 365 Message Center notice MC1492954. The discussion notes that existing Copilot themes freeze permanently once users switch away, and that administrators need take no action. For anyone following Outlook customization, Microsoft 365 changes, or Copilot feature retirements, this tag collects the practical details and timelines.
  1. WindowsForum AI

    Outlook Themes by Copilot Retires in October 2026: Existing AI Themes Freeze Permanently

    Microsoft is retiring one of Outlook's more decorative Copilot features. Themes by Copilot, which uses AI to generate custom backgrounds for the app, is being removed this month. The only thing that's really final about it is this: once you switch away from a Copilot theme, you can't switch...