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crs17's avatar
crs17
Copper Contributor
Jan 08, 2026

The close button seems to be not appearing for open knowledge agent

The close button seems to be not appearing for open knowledge agent, not able to collapse the sidebar/chat window, tried to refresh the page also.

 

office 365
OneDrive for Business

1 Reply

  • NikolinoDE's avatar
    NikolinoDE
    Platinum Contributor
    Jan 10, 2026

    Based on what’s visible, this is a known UI rendering issue with the Knowledge Agent / Copilot pane in OneDrive for Business.

    Below are practical troubleshooting steps, followed by a clean problem description you can use for a support ticket if needed.

     

    What’s happening (from the screenshot)

    • The Knowledge Agent sidebar is fully expanded
    • The Close (X) / Collapse chevron is missing
    • The left navigation is partially hidden
    • There is no visible control to dismiss or collapse the chat pane
    • Refresh does not restore the close button

    This confirms it’s not a user action issue — it’s a front-end UI bug.

     

    Why this happens

    This typically occurs due to one or more of the following:

    1. UI regression from a recent Microsoft 365 update
    2. Browser zoom / scaling issue (button rendered off-canvas)
    3. CSS or script blocked by extensions
    4. Tenant-side Copilot / Knowledge Agent rollout bug
    5. External user (EXT) context rendering issue

    Your screenshot shows Hello Suraj R [EXT]!, which is important — this happens more often for external users.

     

    Confirmed workarounds (these usually work)

     1. Keyboard escape (most reliable)

    Click anywhere inside the chat pane, then press:

    Esc

    In many builds, this collapses the Knowledge Agent even when the button is missing.

     2. Browser zoom reset (very common fix)

    • Set browser zoom to 90% or 100%
    • Maximize the window
    • Hard refresh (Ctrl + F5)

    The close icon is often rendered outside the visible area.

     3. Open OneDrive in a new tab (quick workaround)

    • Right-click OneDrive → Open in new tab
    • The Knowledge Agent usually loads collapsed by default

     4. Try Edge InPrivate or Chrome Incognito

    This bypasses:

    • Extensions
    • Cached UI scripts

    If it works there → extension or cached UI issue.

     5. Temporary URL reset trick

    1. Open OneDrive
    2. Manually append and remove a query string:
    3. ?view=files
    4. Press Enter

    This forces a UI redraw.

     

    Important note (likely root cause)

    Because the user is marked as [EXT], this is very likely a Microsoft bug affecting external users where:

    • Copilot / Knowledge Agent loads
    • Close control fails to render

    Microsoft has acknowledged similar issues in recent M365 UI updates.

     

    My answers are voluntary and without guarantee!

    Hope this will help you.

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