Fix Outlook Calendar Left Navigation Pane Will Not Stay Pinned
Question details
The user needs to make the Outlook Calendar left navigation pane retain its expanded width and pinned state after closing and reopening the application.

- Product
- Microsoft Outlook
- Device & OS
- Windows
- Scenario
- Navigating the calendar view in Outlook and attempting to keep the left panel permanently expanded for easier access to multiple calendars.
- Observed behavior
- The left navigation pane collapses or loses its custom width settings every time Outlook is restarted, forcing the user to manually expand and pin it each time.
Before attempting advanced resets, note your current calendar layout and folder organization, as running certain reset commands may clear customized views and shared calendar groupings.
Adjust the Mail Navigation Pane Width
Because the Mail navigation pane often controls the width of the Calendar pane, adjusting the Mail pane is the safest and most effective first step.
In many versions of Microsoft Outlook, the navigation pane size is shared across different views. If your Mail pane is narrow or collapsed, the Calendar pane will inherit this behavior upon restarting the application.
Open Microsoft Outlook and click on the Mail icon at the bottom left to switch to your email view.
Hover your mouse cursor over the right edge of the left navigation pane until the cursor changes into a double-sided arrow. Click and drag the edge to your desired expanded width.
Click the Calendar icon to switch back to the Calendar view. Pin the pane if necessary, then close and reopen Outlook to ensure the setting is now saved.

Reset Outlook Navigation Pane Settings via Run Command
If resizing the Mail pane fails, clearing corrupted navigation pane settings using a Windows Run command forces Outlook to rebuild the layout.
Clear Corrupted Views
Use this command if the navigation and view settings are deeply corrupted, but be aware it will delete all custom view configurations.
Try WPS Office for a Streamlined Workspace
If you frequently encounter frustrating UI bugs, unpinned panes, or corrupted settings in Microsoft Office apps, consider switching to WPS Office. It provides a lightweight, highly compatible alternative that is easy to manage and completely free for standard use.
- 1. Download the Installer: Visit the official WPS Office website and download the free installation package.
- 2. Install the Software: Run the downloaded file and follow the on-screen prompts to complete the installation.
- 3. Open and Edit Office Files: Launch WPS Office and directly open your existing Word, Excel, or PowerPoint files with full format preservation.

Frequently Asked Questions
Why does the Outlook Calendar navigation pane keep collapsing?
The Calendar navigation pane often shares its width setting with the Mail navigation pane. If the Mail pane is collapsed or set too narrow, the Calendar pane may mimic that behavior upon restart.
Will resetting the navigation pane delete my emails or appointments?
No, running 'Outlook.exe /resetnavpane' only resets the layout of the left navigation pane. It removes custom folders from your Favorites list but does not delete any emails, contacts, or calendar data.
How do I repair my Office installation if Outlook keeps glitching?
You can repair Microsoft 365 by opening your Windows Settings, navigating to Apps & Features, selecting your Microsoft 365 installation, clicking Modify, and choosing either Quick Repair or Online Repair.




