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How to show multiple calendars in the Outlook Todo bar — free add-in solution

Alex May 0 Reputation points
2026-06-08T11:52:27.0066667+00:00

The Outlook Todo bar only shows appointments from the default calendar, with no built-in way to add others. Is there a free solution that shows appointments from all calendars in the Todo pane?

Outlook | Windows | Classic Outlook for Windows | For business

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Alex May 0 Reputation points
2026-06-08T11:52:47.19+00:00

After finding no free solution to this long-standing limitation, I built a free open-source VSTO add-in for Classic Outlook that solves it.

The add-in replaces the built-in Todo bar with a custom pane that shows:

  • Appointments from all calendars across all accounts, colour-coded by calendar
  • Tasks and flagged emails grouped by Overdue / Today / Upcoming / No Date
  • Double-click any item to open and edit it
  • A + button to create a new task directly from the pane

It works with Classic Outlook 2016, 2019, and Microsoft 365 desktop on Windows. It requires Visual Studio Community (free) to build and install — the README has step-by-step instructions.

GitHub: https://github.com/galexmay/Outlook-Todo-Plus-Multiple-Calendar-Pane

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