There is an Excel file created by a user (say User_A).
(This is the only file from many other Excel files that behaves this way.)
Normally when an Excel file is already opened the next user can see who opened that file from a popup warning.
However, with this file no matter who opens this file the next user for some reason gets a notification that the file in use by user User_A.
The problem is that when someone needs to open that file they contact User_A whereas indeed it is opened by someone else.
If someone could shed some light why it could be so and how to fix it that would be great.