Hi Feda,
I agree. That would not be a 'feature'.
Could you list the steps you're using when you see this?
When I used the steps below the issue didn't appear.
With no copies of Excel beta 2 running.
1. Start a new instance of an Excel Workbook from the Start menu option.
2. Repeat step one to have a 2nd Excel instance running.
3. Verified in Windows Task Manager that there are two Excel processes running.
4. Two Excel icons appear on the taskbar (icons not grouped)
5. In Book 1 typed "this is some text" in A1
6. Switched to the 2nd instance via the task bar icons
and repeated step5.
7. Switched back to the 1st instance and clicked the
undo icon until it was greyed out.
8. Switched back to the 2nd instance and the content
was still there.
Could you also check in Excel Options to see what,
if any Add-ins it shows as running?
=========When there are two instances of Excel opened at the same time and you click the undo button after you have undone all of the actions
in one of the Excel instances it jumps to the next Excel instance and starts undoing actions on that document. That can not be a
desired way for this feature to work.>>