Show all windows in the Taskbar

When multiple workbooks are open simultaneously, this determines whether the user will see a single entry for Excel in the taskbar or a separate entry in the taskbar for each open workbook.

Supported on: At least Windows 7
Registry HiveHKEY_CURRENT_USER
Registry Pathsoftware\policies\microsoft\office\16.0\excel\options
Value Nameshowwindowsintaskbar
Value TypeREG_DWORD
Enabled Value1
Disabled Value0

excel16.admx

Administrative Templates (Computers)

Administrative Templates (Users)