Hello @Humay Vahid,
Thank you for posting your question on Microsoft Q&A Forum!
The Daily Task List side panel that was available in the classic Outlook for Windows has been removed in the New Outlook for Windows experience. This change is part of Microsoft’s design update to unify Outlook across platforms. So currently, there is no option to restore the old To-Do Bar or daily task list panel in the monthly calendar view.
Instead, you can use the My Day pane to view and manage tasks alongside your calendar:
- In the New Outlook for Windows, click the My Day icon (calendar with a checkmark) in the upper-right corner.

- The side pane will open with two tabs:
- To Do: Shows your tasks.
- Calendar: Displays your daily schedule.

- You can add tasks, mark them complete, and switch between views easily.
For more details, please check this article: Use My Day with To Do in Outlook
If you prefer the old experience, you may switch back to Classic Outlook (if available in your organization) or provide feedback to Microsoft Feedback Portal.
Thank you again for your patience and raising this important topic, engaged member of the community.
Warmest Regards.
If this response has been helpful, we kindly encourage you to mark it as "Accept Answer". Doing so will assist other users with similar questions in finding accurate and timely solutions more easily.
We appreciate your participation in the community and look forward to supporting you further.
If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.