Introduction
If Microsoft Outlook remains in the foreground and stays on top of other applications even when you switch to a different program, the issue may be related to Windows taskbar settings or a problematic Outlook add-in. Follow the troubleshooting steps below to resolve the problem.
Method 1: Refresh the Windows Taskbar Settings
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Close Outlook completely.
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Right-click the Windows Taskbar and uncheck Lock the taskbar.
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Right-click the taskbar again and re-enable Lock the taskbar by checking the option.
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Launch Outlook and check whether the issue has been resolved.
If Outlook still remains on top of other applications, continue with the next method.
Method 2: Disable the Outlook Social Connector Add-in
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Open Outlook and navigate to:
File → Options → Add-ins
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At the bottom of the window, locate the Manage drop-down menu, select COM Add-ins, and click Go.
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In the list of available add-ins, find Outlook Social Connector 2016 Add-in.
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Clear the checkbox next to the add-in and click OK to save the changes.
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Restart Outlook.
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Verify whether Outlook now behaves normally and no longer stays above other applications.


Conclusion
The issue of Outlook staying on top of other windows is often caused by a temporary taskbar setting conflict or an Outlook add-in. Refreshing the taskbar lock setting and disabling the Outlook Social Connector 2016 Add-in are two effective troubleshooting methods that can help restore normal window behavior. If the problem persists, consider running an Office repair or checking for Outlook updates.
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