in outlook if we open multiple email the stack list shows arrow to up and down is missing.

@ImteyazAhmad-3342 said

see the screenshot there is arrow in the top and bottom to scroll.

Not sure. But it looks like your pic is of the Windows Taskbar when you hover over the Outlook icon and it's showing you a list of all the open Outlook Windows?

If so, I can't reproduce. My Windows 11 Outlook Classic will only show the open windows in a horizontal list.

And (as far as I can tell) Windows 11 Taskbar can't show the open windows list vertically.
https://learn.microsoft.com/en-us/answers/questions/5429711/inquiry-about-taskbar-functionality-and-tile-stack

Are we even talking about the same thing?

Hi @ImteyazAhmad-3342, 

Thank you for sharing the details and for confirming the troubleshooting that has already been completed. 

Since resetting the navigation pane, cleaning Outlook views, recreating the Outlook profile, and testing Outlook in Safe Mode did not resolve the issue, the next recommended step is to repair the Office installation itself. 

To do this please follow these steps: 

1. Repair the Office installation  

• Close all Office applications (Word, PowerPoint, Excel, Outlook, etc.).      
• Open Windows Settings (press Windows + I).      
• Go to Apps > Installed apps.      

• Find Microsoft 365 / Microsoft Office in the list.     
• Select the three dots (…) next to it and choose Modify.      

• If prompted by User Account Control, select Yes.     
• Choose Online Repair > then select Repair.     

• Follow the on‑screen instructions until it completes.     

2. Contact Microsoft Support 

If the issue still continues after Online Repair, please contact your organization’s IT administrator and ask them to create a support ticket with Microsoft. Since the issue remains even after Safe Mode and profile recreation, a technical support engineer may need to initiate a remote session, review backend settings, and run diagnostics. If needed, they can escalate the case to specialized engineering teams who are well-equipped to perform advanced troubleshooting and provide targeted solutions.  

As moderators, our primary goal is to provide helpful guidance and support through general troubleshooting steps. While we don’t have access to internal systems or administrative tools required to resolve account-specific or backend issues, we truly appreciate your understanding of these limitations. We genuinely hope the information we share helps point you in the right direction, and we're always here to assist as much as we can within our scope.  

For guidance on how to request support in the admin center, please refer to: Get support - Microsoft 365 admin.      

In case you do not know who is your IT admin, kindly refer to this article: How do I find my Microsoft 365 admin? - Microsoft Support  

I hope this information is helpful. Please follow the steps above and let me know if it works for you. If not, we can continue working together to resolve the issue.    

Thank you for your patience and understanding. If you have any questions or need additional assistance, please don’t hesitate to reach out so I can continue to support you. If you found the response useful, please consider marking it as accepted, as this may help other community members who are looking for similar guidance.    

I look forward to continuing the conversation.   

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