Office 2021 Outlook Mail Folder problem.

Archie Thomas 0 Reputation points
2026-10-02T20:22:11.79+00:00

Hi, I run Office 2021. I like to keep my Outlook Mail screen tidy and I collapse my folders when I exit Outlook. However when I open Outlook again the Folders are all expanded. How can I get Outlook to retain the collapsed view?

Thanks for any help you can provide.

Outlook | Windows | Classic Outlook for Windows | For home
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  1. AI answer

    2026-10-02T20:22:28.0733333+00:00

    Outlook for Windows does not have a setting to retain all mail folders in a collapsed state after reopening.

    What is supported:

    1. The Navigation Pane and Folder Pane can be minimized or expanded, but that controls the pane itself, not whether each mail folder stays collapsed.
    2. In Outlook, when reopened, folder expansion state is not preserved the way requested.
    3. A related supported option is Conversation view grouping, where messages can be set to All collapsed, but that applies to message groups, not mail folders.

    If the goal is a tidier view, these are the available workarounds:

    1. Minimize the Navigation Pane:
      • View > Navigation Pane > Minimized
      • or click the arrow in the upper corner of the Navigation Pane.
    2. Use the Folder Pane in normal or minimized mode depending on how much space is needed:
      • View > Layout > Folder Pane > Normal or Minimized
    3. If the issue is actually message threads expanding, use:
      • View > View Settings > Group by > All collapsed

    References:

    AI-generated content may be incorrect. Read our transparency notes for more information.

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  2. Vikki-T 11,245 Reputation points Microsoft External Staff Moderator
    2026-10-03T06:24:12.3566667+00:00

    Hi Archie Thomas,

    I can see why having the entire folder tree reopen each time would make Outlook feel unnecessarily cluttered.

    Could you clarify whether Outlook is expanding the mailbox names and their subfolders in the Folder Pane, or expanding message groups such as Today, Yesterday, and Last Week? Those are controlled separately.

    If the folders in the left-hand Folder Pane are reopening unexpectedly, please test Outlook in Safe Mode first:

    • Close Outlook.
    • Press Windows key + R.
    • Enter outlook.exe /safe, then press Enter.
    • Collapse the folders, close Outlook, and reopen it in Safe Mode to check whether the layout is retained.

    If the behavior does not occur in Safe Mode, an Outlook add-in may be interfering with the saved navigation settings.

    If the same behavior continues, close Outlook and run outlook.exe /resetnavpane from the Run dialog. This rebuilds the Folder Pane for the current Outlook profile, so you may need to arrange or collapse the folders again afterward.

    Please let me know whether this affects every mailbox and folder, or only one account or one specific folder tree. That detail will help determine whether the issue is with the Outlook profile or the way that particular mailbox is displayed. Thank you so much for your understanding.   

    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.

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